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

int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);

    int t; cin >> t;
    while(t--){
        long long V,X,Fo,Fi,Q,R; cin >> V >> X >> Fo >> Fi >> Q >> R;
        long long minus = Fo*Q,plus = Fi*R;

        X += -Fo*R+plus;
        if(X > V){cout << "Overflow" << endl; continue;}

        if(minus == plus) cout << "Safe" << endl;
        else if(plus > minus) cout << "Overflow" << endl;
        else cout << "Zero" << endl;
    }
}