Task: Program Execution
Input (English): e, N, 8483, 2811, 5231, D, 6865, 767, 5441, Y, 7915, f, 475, Y, O, x, T, J, 1415, 3313, Z
Output (English): 3, 4, 5, 7, 8, 9, 11, 13, 19, 20