#include<bits/stdc++.h>
using namespace std;
int main(){
for(int i=1;i<=INT__MAX;i++){
    int a,b;
    cin>>a>>b;
    cout<<a+b;
}
}

/**************************************************************
	Problem: 1001
	User: wangyichen2
	Language: C++
	Result: Compile Error
****************************************************************/