#include <bits/stdc++.h>
using namespace std;
using ll = long long;
int main() {
	std::ios_base::sync_with_stdio(false);
	std::cin.tie(nullptr);
	int A, B, C, D;
	int P, Q, R, S, T;
	cin >> A >> B >> C >> D >> P >> Q >> R >> S >> T;
	cout << ((A * P + B * Q + C * R + D * S <= T) ? "Yes\n" : "No\n");
}