Task: Program Execution
Input (English): [[76, -137, 39], [-159, -171, -5, -137, -103, 5], [88, 52], [-133, 6, 84, -110, -126, 18, -4], [-58, 66, -28], [-143, 20, 69, -92]]
Output (English): [76, 5, 88, 84, 66, 69]