#include <iostream>
#include <vector>
using namespace std;

int main()
{
	vector <int> a;
	int b;
	while (cin>>b)
	{
		a.push_back(b);
	}
	for (int i = 0; i<a.size()/2; i++)
	{
		cout<<a[i] + a[a.size()-i-1]<<" ";
	}
	return 0;
}