Task: Program Execution
Input (English): 4729, 1959, 4415, Z, 5527, 1967, 6579, 8867, 7137, M, 7487, 8331, b, R, 8207, 1845
Output (English): 1, 2, 3, 5, 6, 7, 8, 9, 11, 12, 15, 16