Task: Program Execution
Input (English): 2721, Z, 9427, 9463, 9769, X, P, i, L, 913, 7643, 6695, F, r, a, 2805, f, l, e, o, f, 8409, 285
Output (English): 1, 3, 4, 5, 10, 11, 12, 16, 22, 23