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

int main() {
    cin.tie(nullptr);
    ios_base::sync_with_stdio(false);
    vector<pair<ll, ll>> arr(4);
    for (int i = 0; i < 4; i++) cin >> arr[i].second;
    for (int i = 0; i < 4; i++) cin >> arr[i].first;
    ll t; cin >> t;
    sort(arr.begin(), arr.end());
    ll ans = 0;
    for (int i = 0; i < 4; i++) {
        int num = min(t / arr[i].first, arr[i].second);
        ans += num;
        t -= num * arr[i].first;
    }
    cout << ans << "\n";
    return 0;
}