Task: Program Execution
Input (English): D, 4447, 1561, 3637, 3883, 7885, 4091, f, I, 4845, a, k, 9677, l, T, 7787, O, i
Output (English): 4447, 1561, 3637, 3883, 7885, 4091, 4845, 9677, 7787