Task: Program Execution
Input (English): b, 4725, V, R, 2331, 3009, C, 5281, 9251, 2693, 7031, 7181, t, 9685, Q, F, 9449, 8327, M
Output (English): 2, 5, 6, 8, 9, 10, 11, 12, 14, 17, 18