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

#define nl '\n'
using ll = long long;

#ifdef LOCAL
#include "algo/debug.h"
#else
#define dbg(...)
#endif

void solve() {
  ll V, X, Fo, Fi, Q, R;
  cin >> V >> X >> Fo >> Fi >> Q >> R;

  ll cur = X;
  for (int t = 1; t < 10100; ++t) {
    if (t % Q < R) {
      cur += Fi;
    }

    cur -= Fo;

    dbg(t, cur);

    if (cur > V) {
      cout << "Overflow" << nl;
      return;
    }

    if (cur <= 0) {
      cout << "Zero" << nl;
      return;
    }
  }
  cout << "Safe" << nl;
}

signed main() {
  ios_base::sync_with_stdio(0), cin.tie(0);

  int tc = 1;
  cin >> tc;
  while (tc--) {
    solve();
  }
}