Task: Program Execution
Input (English): y, 3701, 4567, 7629, N, 5681, C, 6409, M, 1119, 3529, 8925, 2677, 455, R, k, q, i, b, 2333, b
Output (English): 1, 5, 7, 9, 15, 16, 17, 18, 19, 21