#include <bits/stdc++.h>
using namespace std;
int main(){
	int jie,hie,jh=0,jg=0,hg=0,hh=0;
	while(cin>>jie&&jie!=0){
		jh+=jie;
		jg++;
	}
	while(cin>>hie&&hie!=0){
		hh+=jie;
		hg++;
	}
	printf("%.1f ",jh*1.0/jg);
	printf("%.1f",hh*1.0/hg);  
}
/**************************************************************
	Problem: 1319
	User: wangyiyang
	Language: C++
	Result: Wrong Answer
****************************************************************/