#include<bits/stdc++.h>
using namespace std;
int main(){
	int n,x,y,m;
	cin>>n>>x;
	cout<<n+x;
	cin>>y>>m;
	cout<<y+m;

}
/**************************************************************
	Problem: 1001
	User: 12345678
	Language: C++
	Result: Wrong Answer
****************************************************************/