Task: Program Execution
Input (English): Z, q, g, 7391, 7013, 8267, 8397, D, 1999, f, 5055, q, 4697, r, F, 6795, A, 515, 1113, y, I
Output (English): 1, 2, 3, 8, 10, 12, 14, 15, 17, 20, 21