Task: Program Execution
Input (English): U, g, 1559, 8177, k, 4977, q, k, 695, y, 4073, 2675, b, L, 9015, x, 5233, 4161, O, 8795, f, F
Output (English): 1, 2, 5, 7, 8, 10, 13, 14, 16, 19, 21, 22