#pragma GCC target("avx2")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#include<bits/stdc++.h>
#include<atcoder/all>
using namespace std;
using namespace atcoder;
using ll=long long;

void IO(){
  ios::sync_with_stdio(false);
  std::cin.tie(nullptr);
}

void ans(ll status){
  if(status==0){
    cout<<"Safe"<<endl;
  }else if(status==1){
    cout<<"Overflow"<<endl;
  }else{
    cout<<"Zero"<<endl;
  }
}

int main(){
  IO();
  ll t;
  cin>>t;
  while(t--){
    ll v,x,fo,fi,q,r;
    cin>>v>>x>>fo>>fi>>q>>r;
    ll status=0;//0 normal,1 collapse,2 empty.
    ll now=x;
    now+=r*(fi-fo);
    if(now>v){
      status=1;
    }
    now-=max((ll)0,(q-r))*fo;
    if(now<=0){
      status=2;
    }else{
      ll diff=r*(fi-fo)-max((ll)0,(q-r))*fo;
      if(diff==0){
        status=0;
      }else if(diff>0){
        status=1;
      }else{
        status=2;
      }
    }
    ans(status);
  }
}