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

int main(){
	int T;
	cin >> T;
	while (T--){
		long long V, X;
		int FO, FI, Q, R;
		cin >> V >> X >> FO >> FI >> Q >> R;
		long long in = (long long) FI * R;
		long long out = (long long) FO * Q;
		if (X + (long long) (FI - FO) * R > V || in - out > 0){
			cout << "Overflow" << endl;
		} else if (in - out < 0){
			cout << "Zero" << endl;
		} else {
			cout << "Safe" << endl;
		}
	}
}