Task: Program Execution
Input (English): 3637, 9417, 2481, k, 5913, 3447, q, 783, 7471, L, 6771, 153, 3437, 8791, S, o, 4591, U
Output (English): 1, 2, 3, 5, 6, 8, 9, 11, 12, 13, 14, 17