#include <bits/stdc++.h>
using namespace std;
using ll = long long;
int main() {
	std::ios_base::sync_with_stdio(false);
	std::cin.tie(nullptr);
	vector<pair<ll, ll>> P(4);
	for(int i = 0; i < 4; i++) cin >> P[i].second;
	for(int i = 0; i < 4; i++) cin >> P[i].first;
	ll T;
	cin >> T;
	ll ans = 0;
	sort(P.begin(), P.end());
	for(int i = 0; i < 4; i++) {
		auto [t, n] = P[i];
		ll x = min(n, T/t);
		T -= x * t;
		ans += x;
	}
	cout << ans << endl;
}