#include <bits/stdc++.h>
using namespace std;
int main(){
	int i,a[100],b[100];
	float nah,nap,nuh,nup;
	for(i=0;a[i]!=0;i++){
		cin>>a[i];
		nah+=a[i];
	}
	nap=nah/i;
	for(i=0;b[i]!=0;i++){
		cin>>b[i];
		nuh+=b[i];
	}
	nup=nuh/i;
	printf("%.1f ",nap);
	printf("%.1f",nup);
}
/**************************************************************
	Problem: 1319
	User: wangyiyang
	Language: C++
	Result: Wrong Answer
****************************************************************/