#include <bits/stdc++.h>
// #include <atcoder/modint>
#define rng(a) a.begin(),a.end()
#define rrng(a) a.rbegin(),a.rend()
#define INF 2000000000000000000
#define ull unsigned long long
#define ll long long
#define ld long double
#define pll pair<ll, ll>
using namespace std;
template<class T>bool chmax(T &a, const T &b) { if (a<b) { a=b; return 1; } return 0; }
template<class T>bool chmin(T &a, const T &b) { if (b<a) { a=b; return 1; } return 0; }

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    ll T;
    cin >> T;
    for (ll testcase = 0; testcase < T; ++testcase) {
        ll V, X, Fo, Fi, Q, R;
        cin >> V >> X >> Fo >> Fi >> Q >> R;
        ll diff_per_turn = -Q * Fo + R * Fi;

        if (diff_per_turn > 0) {
            cout << "Overflow" << "\n";
        } 
        else if (diff_per_turn < 0) {
            cout << "Zero" << "\n";
        }
        else {
            if ((Fi - Fo) * R + X > V) {
                cout << "Overflow" << "\n";
            }
            else {
                cout << "Safe" << "\n";
            }
        }
    }
}