#include <atcoder/all>
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define rep(i, s, t) for (ll i = s; i < (ll)(t); i++)
#define all(x) begin(x), end(x)

template <typename T> bool chmin(T &x, T y) {
	return x > y ? (x = y, true) : false;
}
template <typename T> bool chmax(T &x, T y) {
	return x < y ? (x = y, true) : false;
}

struct IOST {
	IOST() {
		ios::sync_with_stdio(false);
		cin.tie(nullptr);
		cout << fixed << setprecision(20);
	}
} IOST;

int main(){
	vector<ll> a(4),b(4);
	rep(i,0,4) cin>>a[i];
	rep(i,0,4) cin>>b[i];
	ll t;
	cin>>t;
	vector<int> p={0,1,2,3};
	sort(p.begin(),p.end(),[&](int i,int j){
		return b[i]<b[j];
	});
	ll ans=0;
	for(int i:p){
		ll d=min(a[i],t/b[i]);
		ans+=d;
		t-=d*b[i];
	}
	cout<<ans<<"\n";
}