#include <bits/stdc++.h>
using namespace std;

int main() {
    int T;
    cin >> T;
    while(T--) {
        long long V, X;
        int F0, F1, Q, R;
        cin >> V >> X >> F0 >> F1 >> Q >> R;
        long long A((long long)(F1 - F0) * (long long)R), B(-(long long)F0 * (long long)(Q - R));
        string ans;
        if(A + B < 0) {
            if(X + A <= V) { ans = "Zero"; }
            else { ans = "Overflow"; }
        }
        if(0 < A + B) {
            if(X + A + B <= 0) { ans = "Zero"; }
            else { ans = "Overflow"; }
        }
        if(A + B == 0) {
            if(V <= X + A) { ans = "Overflow"; }
            else { ans = "Safe"; }
        }
        cout << ans << endl;
    }
    return 0;
}