#include <iostream>
#include <iomanip>  // 用于设置输出宽度

using namespace std;

int main() {

		int a,b;
		while(cin>>a>>b){
			cout<<a+b;	
		}
		

		
		
    return 0;
}

/**************************************************************
	Problem: 1001
	User: 231308061
	Language: C++
	Result: Wrong Answer
****************************************************************/