#include <bits/stdc++.h>
using namespace std;
int main(){
	int a,b;
	cin>>a>>b;
	cout<<a+b;
	int c,d;
	cin>>c>>d;
	cout<<c+d;
	return 0;
} 
/**************************************************************
	Problem: 1001
	User: tonghuawei
	Language: C++
	Result: Wrong Answer
****************************************************************/