#include <bits/stdc++.h>

using namespace std;
#ifdef LOCAL
#include "./library/misc/debug.h"
#else
#define debug(...) 42
#endif // LOCAL

struct ChronoTimer {
  std::chrono::high_resolution_clock::time_point st;

  ChronoTimer() { reset(); }

  void reset() { st = std::chrono::high_resolution_clock::now(); }

  std::chrono::milliseconds::rep elapsed() {
    auto ed = std::chrono::high_resolution_clock::now();
    return std::chrono::duration_cast<std::chrono::milliseconds>(ed - st)
        .count();
  }
};

int main() { 
#ifdef LOCAL
  ChronoTimer chrono;
#endif
  std::cin.tie(nullptr)->sync_with_stdio(false); 
  std::cout << fixed << setprecision(12);

  int T = 1; std::cin >> T;
  while (T--) {
    long long V, X, F, F1, Q, R;
    std::cin >> V >> X >> F >> F1 >> Q >> R;

    if (X + F1 * R - F * R > V) {
      std::cout << "Overflow\n";
      continue;
    }

    long long A = F * Q;
    long long B = F1 * R;
    long long dif = B - A;

    if (dif == 0) {
      std::cout << "Safe\n";
    } else if (dif > 0) {
      std::cout << "Overflow\n";
    } else {
      std::cout << "Zero\n";
    }
  }

#ifdef LOCAL
  cout << "\nRunning Time:" << chrono.elapsed() << "ms\n";
#endif
}