Task: Program Execution
Input (English): L, 4809, 7673, q, 7383, r, X, Z, 2693, 631, 6625, R, X, 3559, 2491, N, 2929, 7509, B
Output (English): 12, 4809, 7673, 17, 7383, 18, 24, 26, 2693, 631, 6625, 18, 24, 3559, 2491, 14, 2929, 7509, 2