#include<iostream>
#include<cassert>
using namespace std;
int main()
{
	ios::sync_with_stdio(false);
	cin.tie(nullptr);
	int T;cin>>T;
	for(;T--;)
	{
		long V,X,Fo,Fi,Q,R;
		cin>>V>>X>>Fo>>Fi>>Q>>R;
		long OX=X;
		X+=(Fi-Fo)*R;
		if(X>V)
		{
			cout<<"Overflow\n";
			continue;
		}
		X-=Fo*(Q-R);
		if(X<0)
		{
			cout<<"Zero\n";
			continue;
		}
		if(X>OX)cout<<"Overflow\n";
		else if(X<OX)cout<<"Zero\n";
		else cout<<"Safe\n";
	}
}