Task: Program Execution
Input (English): P, j, 9301, 4455, 1491, 2555, 3227, 4543, b, 111, 6649, 4653, X, 2989, 5613, C, 5935, l, 8553, 4325, L, Y, 9875
Output (English): 1, 2, 9, 13, 16, 18, 21, 22