Task: Program Execution
Input (English): first: -21
second: 7
first: 13
second: 61
first: 49
second: 53
first: -63
second: 67
first: 4
second: 31
Output (English): first: -63
second: 67
first: -21
second: 7
first: 4
second: 31
first: 13
second: 61
first: 49
second: 53