Task: Program Execution
Input (English): 903, X, 6509, 1445, 4903, 1035, d, 8485, 7785, 3585, b, 1999, 1657, w, f, o, q, 845, K, 435, 631, 2615, M
Output (English): 2, 7, 11, 14, 15, 16, 17, 19, 23