Task: Program Execution
Input (English): [421, -367, 286, -475, 497, -278, 434, 793, -396, 731, -856, 56, 334, 788, 272]
Output (English): [420, -370, 290, -480, 500, -280, 430, 790, -400, 730, -860, 60, 330, 790, 270]