#include<bits/stdc++.h>
using namespace std;
int main(){
	int a,b;
	while(1){
		cin>>a>>b;
		cout<<a+b;
	}
	
	return 0;
}

/**************************************************************
	Problem: 1001
	User: huangsheng
	Language: C++
	Result: Output Limit Exceed
****************************************************************/