Task: Program Execution
Input (English): 6807, q, f, 7949, O, 9359, w, 1165, 9875, 5785, 6475, R, R, W, 8391, Q, 2537, 669, 329, B, F
Output (English): 1, 4, 6, 8, 9, 10, 11, 15, 17, 18, 19