Task: Program Execution
Input (English): U, 2619, 6141, b, 1533, y, 8387, e, 317, v, C, q, 7477, 7603, S, 7333, r, 2715, 8629, 2883, f, 3173, B
Output (English): 2, 3, 5, 7, 9, 13, 14, 16, 18, 19, 20, 22