#include <iostream>
#include <cassert>

using namespace std;
using ll = long long;

void solve (ll V, ll X, int Fo, int Fi, int Q, int R) {
    // 制約を見落としていた。R < Qが常に成立。

    ll trace = (1LL * R * Fi + X) - (1LL * R * Fo);
    if (V < trace) {
        cout << "Overflow\n";
        return;
    }

    trace -= 1LL * (Q-R-1) * Fo;
    if (trace < 0) {
        cout << "Zero\n";
        return;
    }

    ll inflow = 1LL * R * Fi;
    ll outflow = 1LL * Q * Fo;

    if (inflow == outflow) {
        cout << "Safe\n";
        return;
    }
    
    if (inflow < outflow) {
        cout << "Zero\n";
        return;
    }

    if (outflow < inflow) {
        cout << "Overflow\n";
        return;
    }

    assert(0);
}

int main () {
    int T; cin >> T;
    while (T--) {
        ll V, X; cin >> V >> X;
        int Fo, Fi; cin >> Fo >> Fi;
        int Q, R; cin >> Q >> R;

        solve(V, X, Fo, Fi, Q, R);
    }

    return 0;
}