#include <iostream>
using namespace std;
using ll = long long;

int main() {
    int T;
    cin >> T;
    while (T--) {
        ll V, X, Fo, Fi, Q, R;
        cin >> V >> X >> Fo >> Fi >> Q >> R;
        if (R * Fi - Q * Fo > 0) {
            cout << "Overflow" << endl;
        } else if (R * Fi - Q * Fo == 0) {
            cout << "Safe" << endl;
        } else {
            cout << "Zero" << endl;
        }
    }
}