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

#define rep(i, n) for (int i = 0; i < (int)(n); i++)
using ll = long long int;
#define TMAX 10000000000

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 = Fo * (Q - R);
    ll vi = Fi * R - Fo * R;
    ll ve = (vi - vo) * (TMAX / Q);
    if (X - vo <= 0) {
      cout << "Zero" << endl;
      continue;
    }
    if (ve + X > V) {
      cout << "Overflow" << endl;
      continue;
    }
    if (ve + X <= 0) {
      cout << "Zero" << endl;
      continue;
    }
    if (ve + X > 0 && ve + X <= V) {
      cout << "Safe" << endl;
      continue;
    }
  }
  return 0;
}