#include <stdio.h>
#include <bits/stdc++.h>
#include <atcoder/all>
using namespace atcoder;
using mint = modint998244353;
using namespace std;
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define Inf32 1000000001
#define Inf64 1000000000000000001


int main(){
	
	int _t;
	cin>>_t;
	
	rep(_,_t){
		long long V,X,Fo,Fi,Q,R;
		cin>>V>>X>>Fo>>Fi>>Q>>R;
		if(Fo>=Fi){
			cout<<"Zero"<<endl;
			continue;
		}
		
		long long cur = X;
		cur += R*(Fi-Fo);
		if(cur>V){
			cout<<"Overflow"<<endl;
			continue;
		}
		cur -= (Q-R)*Fo;
		if(cur==X)cout<<"Safe"<<endl;
		else if(cur>X)cout<<"Overflow"<<endl;
		else cout<<"Zero"<<endl;
	}
	
	return 0;
}