Task: Program Execution
Input (English): 3847 9933 4749 5211 6789 G u T y 2921 J 8173 9443 U 8921 8469 W 1807 8561 3283 1809 8913 7531 f 9963
Output (English): 1, 2, 3, 4, 5, 10, 12, 13, 15, 16, 18, 19, 20, 21, 22, 23, 25