Task: Program Execution
Input (English): [[56, -139], [35, -20, -157], [-61, -77, 44, 19, 45], [-63, -128], [9, 79, 13], [77, -37, -31, 36, -47, -79], [13, -69, -34, 10]]
Output (English): [56, 35, 45, -63, 79, 77, 13]