BOJ 10952

#include <cstdio>
#include <cstdlib>
#include <iostream>
#include <cstring>
#include <string>
#include <algorithm>
#include <cmath>
#include <vector>
#include <queue>
#include <stack>
#include <deque>
#include <map>
#include <unordered_map>
#include <set>
#include <unordered_set>
#include <functional>

typedef long long int ll;
using namespace std;
#define INF 1234567890
#define N 200000

const int LIMIT = 1e+9;
int n, m;
ll powf(ll base, ll exp) {
	ll res = 1;
	while (exp) {
		if (exp & 1)
			res *= base;
		exp >>= 1;
		base *= base;
	}
	return res;
}

int a, b;
int main() {
	ios::sync_with_stdio(false);
	cin.tie(NULL);
	cout.tie(NULL);

	cin >> a >> b;
	while (!(a == 0 && b == 0)) {
		cout << a + b << "\n";
		cin >> a >> b;
	}

	return 0;
}