Task: Program Execution
Input (English): [421, 901, 353, 977, 887, 656, 78, 859, 61, 214, 601, 409, 331, 685, 337, 824, 534, 37, 439, 4]
Output (English): [421, 353, 977, 887, 859, 61, 601, 409, 331, 337, 37, 439]