Problem:
Print a Frame

Draw a frame which has a height of H cm and a width of W cm. For example, the following figure shows a frame which has a height of 6 cm and a width of 10 cm.

##########
#........#
#........#
#........#
#........#
##########

Input

The input consists of multiple datasets. Each dataset consists of two integers H and W separated by a single space.

The input ends with two 0 (when both H and W are zero).

Output

For each dataset, print the frame made of '#' and '.'.

Print a blank line after each dataset.

Constraints

3 ≤ H ≤ 300

3 ≤ W ≤ 300

Sample Input

3 4
5 6
3 3
0 0

Sample Output

####
#..#
####

######
#....#
#....#
#....#
######

###
#.#
###

Solution in PHP (judge verdict: Wrong Answer)

<?php
while (true) {
    list($height, $width) = getSpacesByExplodeTrimInput();

    if ($height == 0 && $width == 0) {
        break;
    }

    $widthSymbolNum = str_repeat('#', $width).PHP_EOL;
    if ($height == 1) {
        echo $widthSymbolNum;
        break;
    } elseif ($height == 2) {
        echo $widthSymbolNum;
        echo $widthSymbolNum, PHP_EOL;
        break;
    }
    $midleWidthSymbolNum = str_repeat('.', ($width - 2));
    echo $widthSymbolNum;
    for ($i = 2; $i < $height; $i++) {
        echo sprintf("#%d#", $midleWidthSymbolNum), PHP_EOL;
    }
    echo $widthSymbolNum, PHP_EOL;
}

function getSpacesByExplodeTrimInput()
{
    return explode(' ', trim(fgets(STDIN)));
}