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

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