Task: Program Execution
Input (English): 9555, k, 7365, 7481, y, 3943, S, 8953, R, y, s, a, 8365, F, h, 8623, 4479, v, f, I, 1447, X, u
Output (English): 1, 3, 4, 6, 8, 13, 16, 17, 21