Task: Program Execution
Input (English): first: 40
second: 17
first: 50
second: -63
first: -36
second: 9
first: -1
second: 15
first: 72
second: -72
Output (English): first: -36
second: 9
first: -1
second: 15
first: 40
second: 17
first: 50
second: -63
first: 72
second: -72