Task: Program Execution
Input (English): 9933, t, S, i, 4441, 9549, 2681, R, k, U, 3729, B, 8099, 6419, g, l, I, 1491, N, 1239, 9823, d
Output (English): 1, 5, 6, 7, 11, 13, 14, 18, 20, 21