题解 | #多组_A+B_零尾模式#

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        
        while (true) {
            int a = scanner.nextInt();
            int b = scanner.nextInt();
            
            if (a == 0 && b == 0) {
                break;
            }
            
            System.out.println(a + b);
        }
        
        scanner.close();
    }
}