#include <iostream>
using namespace std;

int main() {
    int a, b;
    cin >> a >> b
    while (a && b) {
        cout << a + b << endl;
        cin >> a >> b
    }
    return 0;
}
/**************************************************************
	Problem: 1001
	User: 231308061
	Language: C++
	Result: Compile Error
****************************************************************/