#include <bits/stdc++.h>
using namespace std;

int main(){
	vector<int> l(3);
	for(auto &a:l) cin >> a;
	sort(l.begin(),l.end());
	vector<int> color(3);
	for(auto &b:color) cin >> b;
	sort(color.begin(),color.end(),greater<int>());
	cout << (l[0]*2+l[1]*2) * color[0] + (l[0]*2+l[2]*2) * color[1] + (l[1]*2+l[2]*2) * color[2] << endl;									
	return 0;
}