package backjoon;

import java.io.BufferedReader;

import java.io.InputStreamReader;

import java.util.StringTokenizer;

// A+B - 5

public class _10952 {

public static void main(String[] args) throws Exception {

// sol. memory 11592 kb runtime 84 ms

// BufferedReader 객체 생성 (Exception이 처리를 따로 해줘야 함)

BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

// StringTokenizer 객체 선언

StringTokenizer st;

while (true) {

st = new StringTokenizer(br.readLine(), " "); //한 줄씩

//String to int로 형변환

int a = Integer.parseInt(st.nextToken());

int b = Integer.parseInt(st.nextToken());

if (a == 0 && b == 0) {

break;

}

System.out.println(a+b);

}

}

}