Task: Program Execution
Input (English): 8731, F, X, f, l, 9893, 8049, h, f, Y, D, 9361, d, 3835, 495, Z, u, 2697, M, 3979, 7761, S, 5683
Output (English): 1, 6, 7, 12, 14, 15, 18, 20, 21, 23