백준 10952

import java.util.Scanner;


public class Main10952 {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		
		while(true){
			int A = sc.nextInt();
			int B = sc.nextInt();
			
			if(A ==0 && B ==0 ){
				break;
			}
			System.out.println(A+B);
			
		}
	
	}

}