Task: Program Execution
Input (English): 8701, 6127, 3019, 3551, 215, Z, 3583, 3599, W, 2507, q, t, Z, 8235, 1263, g, z, 6443, E, 8713, D, C
Output (English): 1, 2, 3, 4, 5, 7, 8, 10, 14, 15, 18, 20