#include<bits/stdc++.h>
using namespace std;
using ll = long long;
void solve();
int main(){
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
  int test_case;
  cin>>test_case;
  while (test_case--){
    solve();
  }
}
void solve(){
  ll X,V,IN,OUT,Q,R;
  cin>>V>>X>>OUT>>IN>>Q>>R;
  if(X+(IN-OUT)*R>V){
    cout<<"Overflow\n";
    return;
  }
  ll cyc=IN*R-OUT*Q;
  if(cyc==0){
    cout<<"Safe\n";
  }else if(cyc>0){
    cout<<"Overflow\n";
  }else{
    cout<<"Zero\n";
  }
}