Task: Program Execution
Input (English): 6891, A, 3403, 4707, 7477, U, 7527, 6569, s, 7985, 567, K, o, 3929, 9335, t, 6593, C, 3489, 1367
Output (English): 1, 3, 4, 5, 7, 8, 10, 11, 14, 15, 17, 19, 20