#include <bits/stdc++.h>
using namespace std;
 
int main(){
   float a[100],b[100],l=0,m=0,nc=0,mc=0;
   while(a[nc]!=0){
   	   cin>>a[nc];
   	   l+=a[nc];
   	   nc++;
   }
   while(b[mc]!=0){
   	   cin>>b[mc];
   	   m+=b[mc];
   	   mc++;
   }
   printf("%.1f",l/(nc+1));
   cout<<" ";
   printf("%.1f",m/(mc+1));
   return 0;
}
/**************************************************************
	Problem: 1319
	User: wangyiyang
	Language: C++
	Result: Compile Error
****************************************************************/