#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
using ll = long long;
using ld = long double;
using mint = modint998244353;

void solve() {
  ll v, x, f0, f1, q, r;
  cin >> v >> x >> f0 >> f1 >> q >> r;
  if (x + (f1 - f0) * r > v) {
    cout << "Overflow" << endl;
  } else {
    if (r * f1 - q * f0 > 0) {
      cout << "Overflow" << endl;
    } else if (r * f1 - q * f0 == 0) {
      cout << "Safe" << endl;
    } else {
      cout << "Zero" << endl;
    }
  }
}
int main() {
  int t; cin >> t;
  while (t--) {
    solve();
  }
  return 0;
}