Task: Program Execution
Input (English): P, L, P, X, A, Y, E, L, u, 4653, 2929, 723, O, 3911, 6519, 2269, o, 6375, 2983, 6109, K, 9037
Output (English): 1, 2, 3, 4, 5, 6, 7, 8, 9, 13, 17, 21