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

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

    vector<pair<long long,long long>> AB(4);
    for(auto &[a,b] : AB) cin >> b;
    for(auto &[a,b] : AB) cin >> a;
    sort(AB.begin(),AB.end());

    long long t; cin >> t;
    long long answer = 0;
    for(int i=0; i<4; i++){
        auto [a,b] = AB.at(i);
        answer += min(t/a,b);
        t -= min(t/a,b)*a;
    }    
    cout << answer << endl;
}