Task: Program Execution
Input (English): X, 3097, 8169, N, 543, 6611, X, E, 6895, x, 6905, 5331, 6741, 475, 7111, M, t, l, j, O, C
Output (English): 2, 3, 5, 6, 9, 11, 12, 13, 14, 15