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

#define rep(i, n) for (int i = 0; i < (int)(n); i++)
using ll = long long int;

int main() {
  int T;
  cin >> T;
  rep(i, T) {
    ll V, X;
    int Fo, Fi, Q, R;
    cin >> V >> X >> Fo >> Fi >> Q >> R;
    ll vo = (ll)Fo * (ll)(Q - R);
    ll vi = (ll)Fi * (ll)R - (ll)Fo * (ll)R;
    if (X + vi > V)
      cout << "Overflow" << endl;
    else if (vi - vo > 0)
      cout << "Overflow" << endl;
    else if (vi - vo < 0)
      cout << "Zero" << endl;
    else
      cout << "Safe" << endl;
  }
  return 0;
}