Task: Program Execution
Input (English): [503, 707, 131, 762, 520, 640, 471, 37, 312, 829, 389, 912, 972, 863, 250, 257, 739, 634, 21, 669]
Output (English): [503, 131, 37, 829, 389, 863, 257, 739]