Task: Program Execution
Input (English): [[77, -181, 47, -86], [-86, -73], [34, -83, -81, -142, -129, 12], [-40, -191, 13], [10, -108, 76], [54, -80, -173, 19, -83]]
Output (English): [77, -73, 34, 13, 76, 54]