Task: Program Execution
Input (English): [[-21, -147, -192, -96], [55, 94, -72, -144], [-15, -178, 2], [55, -10, -20, 76], [12, -90, -22, -13, -148], [-138, -171], [24, -68, -103, -184]]
Output (English): [-21, 94, 2, 76, 12, -138, 24]