#include<bits/stdc++.h>
using namespace std;
int main()
{
	int a,b;
	for(;;){
		cin>>a>>b;
		cout<<a+b;	
	}
	
	return 0;
}
/**************************************************************
	Problem: 1001
	User: zzz
	Language: C++
	Result: Output Limit Exceed
****************************************************************/