var walls = [
    [],
    // level 1
    [
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,0,0,0,1,1,1,1,1,1,1,1,0,0,0,0,0,1,1],
        [1,1,0,0,0,1,0,0,0,0,0,0,0,0,1,0,0,0,1,1],
        [1,1,0,0,0,1,0,0,0,0,0,0,0,0,1,0,0,0,1,1],
        [1,1,0,0,0,1,0,0,0,0,0,0,0,0,1,0,0,0,1,1],
        [1,1,0,0,0,1,0,0,0,0,0,0,0,0,1,0,0,0,1,1],
        [1,1,0,0,0,1,0,0,0,0,0,0,0,0,1,0,0,0,1,1],
        [1,1,0,0,0,0,0,1,1,1,1,1,1,1,1,0,0,0,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1]
    ],

    // level 2
    [
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1],
        [1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1],
        [1,1,0,0,1,0,0,0,0,0,0,0,0,0,0,1,0,0,1,1],
        [1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1],
        [1,1,0,0,1,0,0,0,0,0,0,0,0,0,0,1,0,0,1,1],
        [1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1],
        [1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1]
    ],

    // level 3
    [
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,0,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,0,0,0,0,0,0,0,0,0,1,1,1,1,1],
        [1,1,1,1,1,1,0,1,1,1,1,1,1,0,1,1,1,1,1,1],
        [1,1,1,1,1,1,0,1,0,0,0,0,1,0,1,1,1,1,1,1],
        [1,1,1,1,1,1,0,0,0,0,0,0,0,0,1,1,1,1,1,1],
        [1,1,1,1,1,1,0,1,0,0,0,0,1,0,1,1,1,1,1,1],
        [1,1,1,1,1,1,0,1,1,1,1,1,1,0,1,1,1,1,1,1],
        [1,1,1,1,1,0,0,0,0,0,0,0,0,0,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,0,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1]
    ],

    // level 4
    [
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,0,0,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,0,0,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,0,0,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,0,0,0,0,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,0,0,0,0,0,0,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,0,0,0,0,0,0,0,0,1,1,1,1,1],
        [1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1],
        [1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1],
        [1,1,1,1,1,1,1,0,0,0,0,0,0,0,0,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,0,0,0,0,0,0,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,0,0,0,0,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1]
    ],

    // level 5
    [
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,1,1,1],
        [1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,1,1,1],
        [1,1,1,0,1,1,1,1,1,1,1,1,1,1,0,1,0,1,1,1],
        [1,1,1,0,1,0,0,0,0,0,0,0,0,1,0,1,0,1,1,1],
        [1,1,1,0,1,0,1,1,1,0,0,1,1,1,0,1,0,1,1,1],
        [1,1,1,0,1,0,1,0,0,0,0,0,0,1,0,1,0,1,1,1],
        [1,1,1,0,1,0,1,1,1,1,1,1,1,1,0,1,0,1,1,1],
        [1,1,1,0,1,0,0,0,0,0,0,0,0,0,0,1,0,1,1,1],
        [1,1,1,0,1,1,1,1,1,1,1,1,1,1,1,1,0,1,1,1],
        [1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1]
    ],

    // level 6
    [
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,1,1],
        [1,1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,1,1],
        [1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1],
        [1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,0,1,1],
        [1,1,0,1,1,1,0,1,1,1,0,1,1,1,0,1,0,0,1,1],
        [1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1],
        [1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1],
        [1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1],
        [1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1]
    ],

    // level 7
    [
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1],
        [1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1],
        [1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1],
        [1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,1,1],
        [1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1],
        [1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,1,1],
        [1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1],
        [1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1],
        [1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1]
    ],

    // level 8
    [
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,0,0,0,0,1,1,0,0,0,0,1,1,1,1,1],
        [1,1,1,1,1,0,0,1,0,0,0,0,1,1,0,1,1,1,1,1],
        [1,1,1,1,1,0,1,1,0,1,1,0,0,0,0,1,1,1,1,1],
        [1,1,1,1,1,0,0,0,0,1,0,0,1,1,0,1,1,1,1,1],
        [1,1,1,1,1,0,1,1,0,1,1,0,1,1,0,1,1,1,1,1],
        [1,1,1,1,1,0,1,1,0,1,1,0,1,1,0,1,1,1,1,1],
        [1,1,1,1,1,0,0,0,0,1,1,0,1,0,0,1,1,1,1,1],
        [1,1,1,1,1,0,1,1,0,0,0,0,1,1,0,1,1,1,1,1],
        [1,1,1,1,1,0,0,0,0,1,1,0,0,0,0,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1]
    ],

    // level 9
    [
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,0,0,1,1,0,0,0,0,0,0,1,0,0,0,0,0,1,1],
        [1,1,0,0,1,1,0,0,0,0,0,0,1,0,0,0,0,0,1,1],
        [1,1,0,0,0,0,0,0,1,1,0,0,1,0,0,1,0,0,1,1],
        [1,1,0,0,0,0,0,0,1,1,0,0,1,0,0,1,0,0,1,1],
        [1,1,0,0,1,1,1,1,1,1,0,0,1,0,0,1,0,0,1,1],
        [1,1,0,0,1,1,0,0,0,0,0,0,0,0,0,1,1,1,1,1],
        [1,1,0,0,1,1,0,0,0,0,0,0,0,0,0,1,1,1,1,1],
        [1,1,0,0,0,0,0,0,1,1,1,1,1,0,0,0,0,0,1,1],
        [1,1,0,0,0,0,0,0,1,1,1,1,0,0,0,0,0,0,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1]
    ],

    // level 10
    [
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,0,0,1,1,0,0,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,0,0,1,1,0,0,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,0,1,1,1,1,0,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,0,0,1,1,0,0,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,0,0,1,1,0,0,1,1,1,1,1,1,1],
        [1,1,1,1,1,0,0,0,0,1,1,0,0,0,0,1,1,1,1,1],
        [1,1,1,1,1,0,0,1,1,1,1,1,1,0,0,1,1,1,1,1],
        [1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1],
        [1,1,1,1,1,1,1,0,0,0,0,0,0,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1]
    ],

    // level 11
    [
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1],
        [1,1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1],
        [1,1,1,1,1,1,0,0,0,0,0,0,0,0,0,1,1,0,0,1],
        [1,0,0,0,1,1,0,0,0,0,0,0,0,0,0,1,1,0,0,1],
        [1,0,0,0,1,1,0,0,0,0,0,0,0,0,0,1,1,0,0,1],
        [1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,0,0,1],
        [1,1,1,1,1,1,0,0,0,0,0,0,0,0,0,1,1,1,1,1],
        [1,1,1,1,1,1,0,0,0,0,0,0,0,0,0,1,1,1,1,1],
        [1,1,1,1,1,1,0,0,0,0,0,0,0,0,0,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1]
    ],

    // level 12
    [
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1,1,1,1],
        [1,1,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1,1,1,1],
        [1,1,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1,1,1,1],
        [1,1,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1,1,1,1],
        [1,1,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1,1,1,1],
        [1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1],
        [1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1],
        [1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1],
        [1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1]
    ],

    // level 13
    [
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,0,0,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,0,0,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1],
        [1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1],
        [1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1],
        [1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1],
        [1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1],
        [1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1],
        [1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,0,0,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,0,0,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1]
    ],

    // level 14
    [
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,0,0,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,0,0,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,0,0,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,1,1,1,1],
        [1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1],
        [1,1,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,1,1],
        [1,1,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1]
    ],

    // level 15
    [
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,0,0,0,1,0,0,0,0,0,0,1,0,0,0,0,0,0,0,1],
        [1,0,0,0,1,0,0,0,0,0,0,1,0,0,0,0,0,0,0,1],
        [1,0,1,1,1,0,0,0,0,0,0,1,0,0,0,0,0,0,0,1],
        [1,0,0,0,1,0,0,0,1,0,0,1,0,0,0,1,0,0,0,1],
        [1,0,0,0,1,0,0,0,1,0,0,1,0,0,0,1,0,0,0,1],
        [1,0,0,0,1,0,0,0,1,0,0,1,0,0,0,1,0,0,0,1],
        [1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,1,1,1,0,1],
        [1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,1,0,0,0,1],
        [1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,1,0,0,0,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1]
    ],

    // level 16
    [
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,0,0,0,0,0,0,1,1,0,0,0,0,0,0,0,0,1,1,1],
        [1,0,0,0,0,0,0,1,1,0,0,0,0,0,0,0,0,1,1,1],
        [1,1,1,0,0,0,0,1,0,0,0,0,1,0,0,0,0,1,1,1],
        [1,1,1,0,0,0,0,1,0,0,0,0,1,0,0,0,0,1,1,1],
        [1,1,1,0,0,0,0,1,0,0,0,0,1,0,0,0,0,1,1,1],
        [1,1,1,0,0,0,0,1,0,0,0,0,1,0,0,0,0,1,1,1],
        [1,1,1,0,0,0,0,0,0,0,0,1,1,0,0,0,0,0,0,1],
        [1,1,1,0,0,0,0,0,0,0,0,1,1,0,0,0,0,0,0,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1]
    ],

    // level 17
    [
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,0,0,1,1,1,0,1,1,1,1,1,1,0,1,1,1,1],
        [1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1],
        [1,1,1,1,0,1,1,1,0,1,1,1,1,1,1,0,1,1,1,1],
        [1,1,1,1,0,1,0,0,0,0,0,0,0,0,0,0,1,1,1,1],
        [1,1,1,1,0,1,1,1,0,1,1,1,1,1,1,0,1,1,1,1],
        [1,1,1,0,0,1,1,1,0,1,1,1,1,1,1,0,1,1,1,1],
        [1,1,1,1,0,1,1,1,0,0,0,0,0,0,0,0,0,0,1,1],
        [1,1,1,1,0,1,1,1,0,1,1,1,1,1,1,0,1,1,1,1],
        [1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1],
        [1,1,1,1,1,1,1,1,0,1,1,1,1,1,1,0,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1]
    ],

    // level 18
    [
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,0,0,0,0,0,0,0,0,1,1,1,1,1,1],
        [1,1,1,0,0,1,0,0,0,0,0,0,0,0,1,0,0,1,1,1],
        [1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1],
        [1,1,1,0,0,1,0,0,0,0,0,0,0,0,1,0,0,1,1,1],
        [1,1,1,1,1,1,0,0,0,0,0,0,0,0,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1]
    ],

    // level 19
    [
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1],
        [1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1],
        [1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1],
        [1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1],
        [1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1]
    ],

    // level 20
    [
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,0,0,1,0,0,0,0,1,1,0,0,0,0,1,1,0,1,1],
        [1,1,0,0,1,0,1,0,0,1,1,0,1,0,0,1,1,0,1,1],
        [1,1,1,0,1,0,1,1,0,0,0,0,1,1,0,0,0,0,1,1],
        [1,1,1,0,1,0,0,0,0,1,0,0,0,0,0,1,0,0,1,1],
        [1,1,1,0,1,0,1,0,0,1,1,0,1,0,0,1,1,0,1,1],
        [1,1,1,0,0,0,1,1,0,0,0,0,1,1,0,0,0,0,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,0,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,0,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1]
    ],

    // level 21
    [
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1],
        [1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1],
        [1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1],
        [1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,1],
        [1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1],
        [1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,1],
        [1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1],
        [1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1],
        [1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1]
    ],

    // level 22
    [
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,0,0,0,0,0,0,0,0,1,1,0,0,0,0,0,0,0,0,1],
        [1,0,0,0,0,0,0,0,0,1,1,0,0,0,0,0,0,0,0,1],
        [1,0,0,1,1,1,1,0,0,1,1,0,0,1,1,1,1,1,1,1],
        [1,0,0,1,1,1,1,0,0,1,1,0,0,1,1,1,1,1,1,1],
        [1,0,0,1,1,1,1,0,0,1,1,0,0,0,0,0,0,1,1,1],
        [1,0,0,1,0,0,0,0,0,1,1,0,0,0,0,0,0,1,1,1],
        [1,0,0,1,0,0,0,0,0,1,1,1,1,1,1,0,0,1,1,1],
        [1,0,0,1,1,1,1,0,0,1,1,1,1,1,1,0,0,1,1,1],
        [1,0,0,1,1,1,1,0,0,1,1,1,1,1,1,0,0,1,1,1],
        [1,0,0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,1,1,1],
        [1,0,0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1]
    ],

    // level 23
    [
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,0,0,0,1,0,0,0,0,0,0,1,1,1,1,1,1,1],
        [1,1,1,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1,1],
        [1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1],
        [1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1],
        [1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1],
        [1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1],
        [1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1],
        [1,1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,1,1,1],
        [1,1,1,1,1,1,1,0,0,0,0,0,0,1,0,0,0,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1]
    ],

    // level 24
    [
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,0,1,1],
        [1,1,1,1,1,1,1,0,1,1,1,1,1,1,1,1,0,0,1,1],
        [1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1],
        [1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1],
        [1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1],
        [1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1],
        [1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1],
        [1,1,0,0,1,1,1,1,1,1,1,1,0,1,1,1,1,1,1,1],
        [1,1,0,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1]
    ],

    // level 25
    [
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,0,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,0,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,0,0,0,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,0,0,0,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,0,0,0,0,1,1,1,1,0,0,0,1,1,1,1,1,1,1,1],
        [1,0,0,0,0,1,1,1,1,0,0,0,1,1,1,1,1,1,1,1],
        [1,0,0,0,0,1,1,1,1,1,0,1,1,1,1,1,1,1,1,1],
        [1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1],
        [1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1],
        [1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1],
        [1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1]
    ],

    // level 26
    [
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,0,0,1,1,1,1,1,1,1,1,1,1,0,0,1,1,1],
        [1,1,1,0,0,0,1,1,1,1,1,1,1,1,0,0,1,1,1,1],
        [1,1,1,0,0,0,0,1,1,1,1,1,1,0,0,0,0,1,1,1],
        [1,1,1,1,0,0,0,0,1,1,1,1,0,0,0,0,1,1,1,1],
        [1,1,1,1,1,0,0,0,0,1,1,0,0,0,0,1,1,1,1,1],
        [1,1,1,1,1,1,0,0,0,0,0,0,0,0,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,0,0,0,0,0,0,1,1,1,1,1,1,1],
        [1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1],
        [1,0,0,0,0,0,0,0,1,1,1,1,0,0,0,0,0,0,1,1],
        [1,0,0,0,0,0,0,0,1,0,0,1,0,0,0,0,0,0,1,1],
        [1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1]
    ],

    // level 27
    [
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1],
        [1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1],
        [1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1],
        [1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,1],
        [1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1],
        [1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,1],
        [1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1],
        [1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1],
        [1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1]
    ],

    // level 28
    [
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1],
        [1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1],
        [1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1],
        [1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1],
        [1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,0,0,1],
        [1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1],
        [1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1],
        [1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1],
        [1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1],
        [1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1]
    ],

    // level 29
    [
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,0,0,1,1,1,1,1,1,1,1,1,1,1,1,0,0,1,1],
        [1,1,0,0,1,1,1,1,1,1,1,1,1,1,1,1,0,0,1,1],
        [1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1],
        [1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1],
        [1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1],
        [1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1],
        [1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1],
        [1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1],
        [1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1]
    ],

    // level 30
    [
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1],
        [1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1],
        [1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1],
        [1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1],
        [1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1],
        [1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1],
        [1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1],
        [1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1],
        [1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1],
        [1,0,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,0,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1]
    ]
];

var walls_stroke = [
    [],
    // level 1
    [
        [
            [2, 4],
            [2, 11],
            [7, 11],
            [7, 10],
            [14, 10],
            [14, 5],
            [15, 5],
            [15, 11],
            [18, 11],
            [18, 4],
            [13, 4],
            [13, 5],
            [6, 5],
            [6, 10],
            [5, 10],
            [5, 4],
            [2, 4],
            [2, 5]
        ]
    ],

    // level 2
    [
        [
            [5, 4],
            [5, 7],
            [4, 7],
            [4, 6],
            [2, 6],
            [2, 9],
            [4, 9],
            [4, 8],
            [5, 8],
            [5, 11],
            [15, 11],
            [15, 8],
            [16, 8],
            [16, 9],
            [18, 9],
            [18, 6],
            [16, 6],
            [16, 7],
            [15, 7],
            [15, 4],
            [5, 4],
            [5, 5]
        ]
    ],

    // level 3
    [
        [
            [6, 4],
            [8, 4],
            [8, 3],
            [9, 3],
            [9, 4],
            [15, 4],
            [15, 5],
            [14, 5],
            [14, 11],
            [12, 11],
            [12, 12],
            [11, 12],
            [11, 11],
            [5, 11],
            [5, 10],
            [6, 10],
            [6, 4],
            [7, 4]
        ],
        [
            [7, 5],
            [13, 5],
            [13, 7],
            [12, 7],
            [12, 6],
            [8, 6],
            [8, 7],
            [7, 7],
            [7, 5],
            [8, 5]
        ],
        [
            [7, 8],
            [8, 8],
            [8, 9],
            [12, 9],
            [12, 8],
            [13, 8],
            [13, 10],
            [7, 10],
            [7, 8],
            [8, 8]
        ]
    ],

    // level 4
    [
        [
            [10, 2],
            [12, 2],
            [12, 5],
            [13, 5],
            [13, 6],
            [14, 6],
            [14, 7],
            [15, 7],
            [15, 11],
            [14, 11],
            [14, 12],
            [13, 12],
            [13, 13],
            [9, 13],
            [9, 12],
            [8, 12],
            [8, 11],
            [7, 11],
            [7, 10],
            [4, 10],
            [4, 8],
            [7, 8],
            [7, 7],
            [8, 7],
            [8, 6],
            [9, 6],
            [9, 5],
            [10, 5],
            [10, 2],
            [12, 2]
        ]
    ],

    // level 5
    [
        [
            [2, 2],
            [18, 2],
            [18, 3],
            [17, 3],
            [17, 13],
            [3, 13],
            [3, 5],
            [2, 5],
            [2, 4],
            [15, 4],
            [15, 11],
            [5, 11],
            [5, 6],
            [13, 6],
            [13, 7],
            [11, 7],
            [11, 8],
            [13, 8],
            [13, 9],
            [7, 9],
            [7, 8],
            [9, 8],
            [9, 7],
            [6, 7],
            [6, 10],
            [14, 10],
            [14, 5],
            [4, 5],
            [4, 12],
            [16, 12],
            [16, 3],
            [2, 3],
            [2, 2],
            [3, 2]
        ]
    ],

    // level 6
    [
        [
            [2, 5],
            [6, 5],
            [6, 3],
            [18, 3],
            [18, 13],
            [2, 13],
            [2, 8],
            [3, 8],
            [3, 9],
            [6, 9],
            [6, 8],
            [7, 8],
            [7, 9],
            [10, 9],
            [10, 8],
            [11, 8],
            [11, 9],
            [14, 9],
            [14, 8],
            [15, 8],
            [15, 9],
            [16, 9],
            [16, 7],
            [2, 7],
            [2, 5],
            [3, 5]
        ]
    ],

    // level 7
    [
        [
            [2, 6],
            [5, 6],
            [5, 3],
            [15, 3],
            [15, 7],
            [16, 7],
            [16, 6],
            [18, 6],
            [18, 9],
            [16, 9],
            [16, 8],
            [15, 8],
            [15, 12],
            [5, 12],
            [5, 9],
            [2, 9],
            [2, 6],
            [3, 6]
        ]
    ],

    // level 8
    [
        [
            [5, 3],
            [5, 12],
            [9, 12],
            [9, 11],
            [11, 11],
            [11, 12],
            [15, 12],
            [15, 3],
            [11, 3],
            [11, 4],
            [9, 4],
            [9, 3],
            [5, 3],
            [5, 4]
        ],
        [
            [6, 5],
            [7, 5],
            [7, 4],
            [8, 4],
            [8, 6],
            [6, 6],
            [6, 5],
            [7, 5]
        ],
        [
            [6, 7],
            [8, 7],
            [8, 9],
            [6, 9],
            [6, 7],
            [7, 7]
        ],
        [
            [6, 10],
            [8, 10],
            [8, 11],
            [6, 11],
            [6, 10],
            [7, 10]
        ],
        [
            [9, 5],
            [11, 5],
            [11, 6],
            [10, 6],
            [10, 7],
            [11, 7],
            [11, 10],
            [9, 10],
            [9, 5],
            [10, 5]
        ],
        [
            [12, 4],
            [14, 4],
            [14, 5],
            [12, 5],
            [12, 4],
            [13, 4]
        ],
        [
            [12, 6],
            [14, 6],
            [14, 9],
            [13, 9],
            [13, 10],
            [14, 10],
            [14, 11],
            [12, 11],
            [12, 6],
            [13, 6]
        ]
    ],

    // level 9
    [
        [
            [2, 3],
            [4, 3],
            [4, 5],
            [6, 5],
            [6, 3],
            [12, 3],
            [12, 8],
            [13, 8],
            [13, 3],
            [18, 3],
            [18, 8],
            [16, 8],
            [16, 5],
            [15, 5],
            [15, 10],
            [18, 10],
            [18, 12],
            [12, 12],
            [12, 11],
            [13, 11],
            [13, 10],
            [8, 10],
            [8, 12],
            [2, 12],
            [2, 3],
            [3, 3]
        ],
        [
            [4, 7],
            [8, 7],
            [8, 5],
            [10, 5],
            [10, 8],
            [6, 8],
            [6, 10],
            [4, 10],
            [4, 7],
            [5, 7]
        ]
    ],

    // level 10
    [
        [
            [7, 3],
            [7, 8],
            [5, 8],
            [5, 11],
            [7, 11],
            [7, 12],
            [13, 12],
            [13, 11],
            [15, 11],
            [15, 8],
            [13, 8],
            [13, 3],
            [11, 3],
            [11, 5],
            [12, 5],
            [12, 6],
            [11, 6],
            [11, 9],
            [13, 9],
            [13, 10],
            [7, 10],
            [7, 9],
            [9, 9],
            [9, 6],
            [8, 6],
            [8, 5],
            [9, 5],
            [9, 3],
            [7, 3],
            [7, 4]
        ]
    ],

    // level 11
    [
        [
            [6, 3],
            [6, 8],
            [4, 8],
            [4, 6],
            [1, 6],
            [1, 9],
            [6, 9],
            [6, 12],
            [15, 12],
            [15, 5],
            [17, 5],
            [17, 9],
            [19, 9],
            [19, 3],
            [6, 3],
            [6, 4]
        ]
    ],

    // level 12
    [
        [
            [2, 3],
            [12, 3],
            [12, 8],
            [18, 8],
            [18, 12],
            [2, 12],
            [2, 3]
        ]
    ],

    // level 13
    [
        [
            [5, 4],
            [9, 4],
            [9, 2],
            [11, 2],
            [11, 4],
            [15, 4],
            [15, 11],
            [11, 11],
            [11, 13],
            [9, 13],
            [9, 11],
            [5, 11],
            [5, 4],
            [6, 4]
        ]
    ],

    // level 14
    [
        [
            [2, 8],
            [15, 8],
            [15, 4],
            [18, 4],
            [18, 7],
            [16, 7],
            [16, 8],
            [18, 8],
            [18, 11],
            [6, 11],
            [6, 9],
            [5, 9],
            [5, 11],
            [2, 11],
            [2, 8],
            [3, 8]
        ]
    ],

    // level 15
    [
        [
            [1, 3],
            [4, 3],
            [4, 5],
            [2, 5],
            [2, 6],
            [4, 6],
            [4, 9],
            [5, 9],
            [5, 3],
            [11, 3],
            [11, 9],
            [12, 9],
            [12, 3],
            [19, 3],
            [19, 12],
            [16, 12],
            [16, 10],
            [18, 10],
            [18, 9],
            [16, 9],
            [16, 6],
            [15, 6],
            [15, 12],
            [9, 12],
            [9, 6],
            [8, 6],
            [8, 12],
            [1, 12],
            [1, 3],
            [2, 3]
        ]
    ],

    // level 16
    [
        [
            [1, 4],
            [7, 4],
            [7, 10],
            [8, 10],
            [8, 6],
            [9, 6],
            [9, 4],
            [17, 4],
            [17, 10],
            [19, 10],
            [19, 12],
            [13, 12],
            [13, 6],
            [12, 6],
            [12, 10],
            [11, 10],
            [11, 12],
            [3, 12],
            [3, 6],
            [1, 6],
            [1, 4],
            [2, 4]
        ]
    ],

    // level 17
    [
        [
            [3, 3],
            [3, 4],
            [4, 4],
            [4, 8],
            [3, 8],
            [3, 9],
            [4, 9],
            [4, 11],
            [2, 11],
            [2, 12],
            [8, 12],
            [8, 13],
            [9, 13],
            [9, 12],
            [15, 12],
            [15, 13],
            [16, 13],
            [16, 10],
            [18, 10],
            [18, 9],
            [16, 9],
            [16, 5],
            [18, 5],
            [18, 4],
            [16, 4],
            [16, 3],
            [15, 3],
            [15, 4],
            [9, 4],
            [9, 3],
            [8, 3],
            [8, 4],
            [5, 4],
            [5, 2],
            [4, 2],
            [4, 3],
            [3, 3],
            [3, 4]
        ],
        [
            [5, 5],
            [5, 11],
            [8, 11],
            [8, 7],
            [6, 7],
            [6, 6],
            [8, 6],
            [8, 5],
            [5, 5],
            [5, 6]
        ],
        [
            [9, 5],
            [15, 5],
            [15, 6],
            [9, 6],
            [9, 5],
            [10, 5]
        ],
        [
            [9, 7],
            [15, 7],
            [15, 9],
            [9, 9],
            [9, 7],
            [10, 7]
        ],
        [
            [9, 10],
            [15, 10],
            [15, 11],
            [9, 11],
            [9, 10],
            [10, 10]
        ]
    ],

    // level 18
    [
        [
            [3, 6],
            [5, 6],
            [5, 7],
            [6, 7],
            [6, 5],
            [14, 5],
            [14, 7],
            [15, 7],
            [15, 6],
            [17, 6],
            [17, 9],
            [15, 9],
            [15, 8],
            [14, 8],
            [14, 10],
            [6, 10],
            [6, 8],
            [5, 8],
            [5, 9],
            [3, 9],
            [3, 6],
            [4, 6]
        ]
    ],

    // level 19
    [
        [
            [3, 6],
            [5, 6],
            [5, 5],
            [15, 5],
            [15, 6],
            [17, 6],
            [17, 9],
            [15, 9],
            [15, 10],
            [5, 10],
            [5, 9],
            [3, 9],
            [3, 6],
            [4, 6]
        ]
    ],

    // level 20
    [
        [
            [2, 4],
            [4, 4],
            [4, 9],
            [5, 9],
            [5, 4],
            [9, 4],
            [9, 6],
            [11, 6],
            [11, 4],
            [15, 4],
            [15, 6],
            [17, 6],
            [17, 4],
            [18, 4],
            [18, 12],
            [16, 12],
            [16, 10],
            [14, 10],
            [14, 9],
            [13, 9],
            [13, 8],
            [12, 8],
            [12, 10],
            [8, 10],
            [8, 9],
            [7, 9],
            [7, 8],
            [6, 8],
            [6, 10],
            [3, 10],
            [3, 6],
            [2, 6],
            [2, 4],
            [3, 4]
        ],
        [
            [6, 5],
            [7, 5],
            [7, 6],
            [8, 6],
            [8, 7],
            [6, 7],
            [6, 5],
            [7, 5]
        ],
        [
            [9, 7],
            [10, 7],
            [10, 8],
            [11, 8],
            [11, 9],
            [9, 9],
            [9, 7],
            [10, 7]
        ],
        [
            [12, 5],
            [13, 5],
            [13, 6],
            [14, 6],
            [14, 7],
            [12, 7],
            [12, 5],
            [13, 5]
        ],
        [
            [15, 7],
            [16, 7],
            [16, 8],
            [17, 8],
            [17, 9],
            [15, 9],
            [15, 7],
            [16, 7]
        ]
    ],

    // level 21
    [
        [
            [1, 6],
            [3, 6],
            [3, 7],
            [4, 7],
            [4, 3],
            [16, 3],
            [16, 7],
            [17, 7],
            [17, 6],
            [19, 6],
            [19, 9],
            [17, 9],
            [17, 8],
            [16, 8],
            [16, 12],
            [4, 12],
            [4, 8],
            [3, 8],
            [3, 9],
            [1, 9],
            [1, 6],
            [2, 6]
        ]
    ],

    // level 22
    [
        [
            [3, 4],
            [7, 4],
            [7, 7],
            [4, 7],
            [4, 9],
            [7, 9],
            [7, 13],
            [17, 13],
            [17, 6],
            [13, 6],
            [13, 4],
            [19, 4],
            [19, 2],
            [11, 2],
            [11, 8],
            [15, 8],
            [15, 11],
            [9, 11],
            [9, 2],
            [1, 2],
            [1, 13],
            [5, 13],
            [5, 11],
            [3, 11],
            [3, 4],
            [4, 4]
        ]
    ],

    // level 23
    [
        [
            [3, 3],
            [6, 3],
            [6, 4],
            [7, 4],
            [7, 3],
            [13, 3],
            [13, 4],
            [14, 4],
            [14, 5],
            [15, 5],
            [15, 10],
            [17, 10],
            [17, 12],
            [14, 12],
            [14, 11],
            [13, 11],
            [13, 12],
            [7, 12],
            [7, 11],
            [6, 11],
            [6, 10],
            [5, 10],
            [5, 5],
            [3, 5],
            [3, 3],
            [4, 3]
        ]
    ],

    // level 24
    [
        [
            [2, 5],
            [7, 5],
            [7, 4],
            [8, 4],
            [8, 5],
            [16, 5],
            [16, 3],
            [18, 3],
            [18, 10],
            [13, 10],
            [13, 11],
            [12, 11],
            [12, 10],
            [4, 10],
            [4, 12],
            [2, 12],
            [2, 5],
            [3, 5]
        ]
    ],

    // level 25
    [
        [
            [1, 4],
            [2, 4],
            [2, 2],
            [4, 2],
            [4, 4],
            [5, 4],
            [5, 9],
            [10, 9],
            [10, 8],
            [9, 8],
            [9, 6],
            [12, 6],
            [12, 8],
            [11, 8],
            [11, 9],
            [17, 9],
            [17, 10],
            [19, 10],
            [19, 12],
            [17, 12],
            [17, 13],
            [1, 13],
            [1, 4],
            [2, 4]
        ]
    ],

    // level 26
    [
        [
            [3, 2],
            [5, 2],
            [5, 3],
            [6, 3],
            [6, 4],
            [7, 4],
            [7, 5],
            [8, 5],
            [8, 6],
            [9, 6],
            [9, 7],
            [11, 7],
            [11, 6],
            [12, 6],
            [12, 5],
            [13, 5],
            [13, 4],
            [14, 4],
            [14, 3],
            [15, 3],
            [15, 2],
            [17, 2],
            [17, 3],
            [16, 3],
            [16, 4],
            [17, 4],
            [17, 5],
            [16, 5],
            [16, 6],
            [15, 6],
            [15, 7],
            [14, 7],
            [14, 8],
            [13, 8],
            [13, 9],
            [19, 9],
            [19, 10],
            [18, 10],
            [18, 12],
            [19, 12],
            [19, 13],
            [9, 13],
            [9, 11],
            [11, 11],
            [11, 12],
            [12, 12],
            [12, 10],
            [8, 10],
            [8, 13],
            [1, 13],
            [1, 9],
            [7, 9],
            [7, 8],
            [6, 8],
            [6, 7],
            [5, 7],
            [5, 6],
            [4, 6],
            [4, 5],
            [3, 5],
            [3, 2],
            [4, 2]
        ]
    ],

    // level 27
    [
        [
            [1, 6],
            [3, 6],
            [3, 7],
            [4, 7],
            [4, 3],
            [16, 3],
            [16, 7],
            [17, 7],
            [17, 6],
            [19, 6],
            [19, 9],
            [17, 9],
            [17, 8],
            [16, 8],
            [16, 12],
            [4, 12],
            [4, 8],
            [3, 8],
            [3, 9],
            [1, 9],
            [1, 6],
            [2, 6]
        ]
    ],

    // level 28
    [
        [
            [1, 2],
            [18, 2],
            [18, 5],
            [19, 5],
            [19, 10],
            [18, 10],
            [18, 13],
            [1, 13],
            [1, 11],
            [3, 11],
            [3, 8],
            [16, 8],
            [16, 7],
            [3, 7],
            [3, 4],
            [1, 4],
            [1, 2],
            [2, 2]
        ]
    ],

    // level 29
    [
        [
            [2, 3],
            [4, 3],
            [4, 5],
            [16, 5],
            [16, 3],
            [18, 3],
            [18, 12],
            [2, 12],
            [2, 3],
            [3, 3]
        ]
    ],

    // level 30
    [
        [
            [1, 2],
            [19, 2],
            [19, 11],
            [3, 11],
            [3, 13],
            [1, 13],
            [1, 2],
            [2, 2]
        ]
    ]
];

function drawWalls_fill() {
    // colors
    var wallsColor, floorColor0, floorColor1;
    if (level >= WALLS_RED) {
        wallsColor = WALLS_COLOR_2;
        floorColor0 = TILE_COLOR_2_0;
        floorColor1 = TILE_COLOR_2_1;
    } else if (level >= WALLS_PURPLE) {
        wallsColor = WALLS_COLOR_1;
        floorColor0 = TILE_COLOR_1_0;
        floorColor1 = TILE_COLOR_1_1;
    } else {
        wallsColor = WALLS_COLOR_0;
        floorColor0 = TILE_COLOR_0_0;
        floorColor1 = TILE_COLOR_0_1;
    }

    // walls
    canvas.beginPath();
    canvas.rect(os.x, os.y, cwh(CANVAS_WIDTH), cwh(CANVAS_HEIGHT));
    canvas.fillStyle = wallsColor;
    canvas.fill();

    // bg tiles
    for (var y = 0; y < TILES_Y; y++) {
        for (var x = 0; x < TILES_X; x++) {
            if (walls[level][y][x] == 0) {
                // get bg tile color
                var bgTileColor = floorColor0;
                if (x % 2 == 0 && y % 2 == 0 ||
                    x % 2 == 1 && y % 2 == 1)
                    bgTileColor = floorColor1;

                // draw bg tile color
                canvas.beginPath();
                canvas.rect(x * cwh(TILE_SIZE) + os.x, y * cwh(TILE_SIZE) + os.y, cwh(TILE_SIZE), cwh(TILE_SIZE));
                canvas.fillStyle = bgTileColor;
                canvas.fill();
            }
        }
    }
}

function drawWalls_stroke() {
    for (var i = 0; i < walls_stroke[level].length; i++) {
        for (var j = 0; j < walls_stroke[level][i].length; j++) {
            if (j == 0) {
                canvas.beginPath();
                canvas.moveTo(walls_stroke[level][i][j][0] * cwh(TILE_SIZE) + os.x, walls_stroke[level][i][j][1] * cwh(TILE_SIZE) + os.y);
            } else {
                canvas.lineTo(walls_stroke[level][i][j][0] * cwh(TILE_SIZE) + os.x, walls_stroke[level][i][j][1] * cwh(TILE_SIZE) + os.y);
            }
        }
        canvas.lineWidth = cwh(OUTLINE_SIZE);
        canvas.strokeStyle = "black";
        canvas.stroke();
    }
}