IntegerExchange

import java.util.Scanner;

public class ExchangeIntegers {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);


        int firstNum = Integer.parseInt(scanner.nextLine());
        int secondNum = Integer.parseInt(scanner.nextLine());

        int beforeFirst = firstNum;
        int beforeSecond = secondNum;

        int afretFirst = beforeSecond;
        int afterSecond = beforeFirst;

        System.out.println("Before:");
        System.out.printf("a = %d%n", beforeFirst);
        System.out.printf("b = %d%n", beforeSecond);
        System.out.println("After:");
        System.out.printf("a = %d%n", afretFirst);
        System.out.printf("b = %d", afterSecond);
    }
}