Task: Program Execution
Input (English): 2501, F, q, 6731, 5015, S, F, r, 8107, i, C, 579, 5209, 9209, y, 8439, 9785, P, 1739, 8475, k
Output (English): 1, 4, 5, 9, 12, 13, 14, 16, 17, 19, 20