#include <bits/stdc++.h>
using namespace std;
#ifndef ONLINE_JUDGE
#include "debug.h"
#else
#define debug(...) (void)20240209
#endif
using i64 = int64_t;
int main() {
  cin.tie(nullptr)->sync_with_stdio(false);
  cout << fixed << setprecision(20);
  int t;
  cin >> t;
  for (int ti = 0; ti < t; ti += 1) {
    i64 v, x, fo, fi, q, r;
    cin >> v >> x >> fo >> fi >> q >> r;
    if (x + (fi - fo) * r > v) {
      cout << "Overflow\n";
      continue;
    }
    i64 s = fi * r - fo * q;
    if (s == 0) {
      cout << "Safe\n";
    } else if (s > 0) {
      cout << "Overflow\n";
    } else {
      cout << "Zero\n";
    }
  }
}