#include <bits/stdc++.h> using namespace std; long long a , b; int main() { while (cin >> a >> b) { if (a == 0 && b == 0) { break; } cout << a + b << endl; } return 0; }
#include <bits/stdc++.h> using namespace std; long long a , b; int main() { while (cin >> a >> b) { if (a == 0 && b == 0) { break; } cout << a + b << endl; } return 0; }