Task: Program Execution
Input (English): 2603, E, S, 385, a, 3415, 6591, Q, A, 9031, 4793, X, 5589, 117, 8401, A, 5659, 4173, 4745, 8453, U
Output (English): 1, 4, 6, 7, 10, 11, 13, 14, 15, 17, 18, 19, 20