#include <bits/stdc++.h>
#ifdef LOCAL
#include "./debug.cpp"
#else
#define debug(...)
#define print_line
#endif
using namespace std;
using ll = long long;

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