#include <bits/stdc++.h>
using namespace std;
int main() {
    int a, b, c, d, x, y;
    cin >> a >> b >> c >> d >> x >> y;

    for (int p = 100; p >= 0; p--) {
        int m = p + x;//数学
        int e = p - y;//英语
        if (m > 100) continue;
        if (e < 0) continue;
        int sum = a + b + c + d + m + e;
        if (sum % 6 == 0 && sum / 6 == p) {
            cout << p << endl;
            break;
        }
    }
    return 0;
}