#pragma GCC optimize("Ofast")
#include <bits/stdc++.h>
using namespace std;
typedef long long int ll;
typedef unsigned long long int ull;

mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
ll myRand(ll B) {
    return (ull)rng() % B;
}
inline double time() {
    return static_cast<long double>(chrono::duration_cast<chrono::nanoseconds>(chrono::steady_clock::now().time_since_epoch()).count()) * 1e-9;
}

int main() {
    cin.tie(nullptr);
    ios::sync_with_stdio(false);
    int q; cin >> q;
    while (q--) {
        ll v; cin >> v;
        ll x; cin >> x;
        ll O,I; cin >> O >> I;
        ll Q,R; cin >> Q >> R;
        if (O >= I) {
            if (O == I and R == Q-1) {
                cout << "Safe" << "\n";
            }
            else {
                cout << "Zero" << "\n";
            }
        }
        else {
            ll up = (I-O)*R;
            ll d = up-(Q-R)*O;
            if (d > 0 or x+up > v) {
                cout << "Overflow" << "\n";
            }
            else if (d == 0) {
                cout << "Safe" << "\n";
            }
            else {
                cout << "Zero" << "\n";
            }
        }
    }
}