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

template<class T> istream& operator >> (istream& is, vector<T>& vec) {
    for(T& x : vec) is >> x;
    return is;
}

template<class T> ostream& operator << (ostream& os, const vector<T>& vec) {
    if(vec.empty()) return os;
    os << vec[0];
    for(auto it = vec.begin(); ++it != vec.end(); ) os << ' ' << *it;
    return os;
}

int main(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    ll t;
    vector<pair<ll,ll>> a(4);
    for(auto &&[x, y] : a) cin >> y;
    for(auto &&[x, y] : a) cin >> x;
    cin >> t;

    ll ans = 0;
    sort(a.begin(), a.end());
    for(auto [x, y] : a){
        ll d = min(y, t / x);
        t -= x * d;
        ans += d;
    }
    cout << ans << '\n';
}