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

int main() {
int T;
cin >> T;
for (int i = 0;i<T;i++)
{
	int64_t V, X, F1, F2, Q, R;
	cin >> V >> X >> F1 >> F2 >> Q >> R;
	int ol;
	ol = (R * (F2 - F1)) - ((Q - R) * F1);

	if (ol < 0)
	{
		cout << "Zero" << endl;
	}
	else if (ol == 0)
	{
		cout << "Safe" << endl;
	}
	else
	{
		cout << "Overflow" << endl;
	}
}
}