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

int main() {
  int T;
  cin >> T;
  for(int i=0;i<T;i++){
    long long V,X,Fo,Fi,Q,R;
    cin >> V >> X >> Fo >> Fi >> Q >> R;
    long long tmp=X;
    X+=(Fi-Fo)*R;
    if(X>V){
      cout << "Overflow" << endl;
      continue;
    }
    if(X<=0){
      cout << "Zero" << endl;
      continue;
    }
    X-=Fo*(Q-R);
    if(tmp==X){
      cout << "safe" << endl;
    }
    else if(tmp>X){
      cout << "Zero" << endl;
    }
    else{
      cout << "Overflow" << endl;
    }
  }
}