Task: Program Execution
Input (English): 3309, 5911, 2769, 4127, P, a, I, y, 6955, f, 9061, F, 6967, 4465, m, X, 2741, g, Y, 7453, k
Output (English): 5, 6, 7, 8, 10, 12, 15, 16, 18, 19, 21