#include<bits/stdc++.h>

using namespace std;
using ll = long long;
using pint = pair<int,int>;
void solve();

int main()
{
	int T;
	cin >> T;
	while(T--)solve();
}

void solve()
{
	ll V,X,Fo,Fi,Q,R;
	cin>>V>>X>>Fo>>Fi>>Q>>R;
	ll a = Fi*R-Fo*R;
	ll b = Fi*R-Fo*Q;

	if(X + a > V) {
		cout << "Overflow" << endl;
		return;
	}
	if(X + b <= 0) {
		cout << "Zero" << endl;
		return;
	}
	if(b == 0) {
		cout << "Safe" << endl; return;
	}
	cout << (b>0?"Overflow":"Zero") << endl;

}