#include <bits/stdc++.h>
//#include <atcoder/modint>

using namespace std;
//using namespace atcoder;
using ll = long long;
//using mint = modint998244353;

int main(){
    cin.tie(nullptr);
    ios_base::sync_with_stdio(false);

    ll T, ans=0, x;
    vector<pair<ll, ll>> a(4);
    for (int i=0; i<4; i++) cin >> a[i].second;
    for (int i=0; i<4; i++) cin >> a[i].first;
    cin >> T;
    sort(a.begin(), a.end());

    for (int i=0; i<4; i++){
        x = min(a[i].second, T/a[i].first);
        T -= x * a[i].first;
        ans += x;
    }

    cout << ans << endl;

    return 0;
}