Task: Program Execution
Input (English): 7149, 2791, g, 1425, C, 4367, 6469, 7857, T, 8791, 5687, H, 8799, G, a, 1035, s, u, t, 739, F, X, x, P
Output (English): 1, 2, 4, 6, 7, 8, 10, 11, 13, 16, 20