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

ll V, X, Fo, Fi, Q, R;
void solve(){
    cin >> V >> X >> Fo >> Fi >> Q >> R;
    ll a = (Fi - Fo) * R;
    ll b = (- Fo) * (Q - R);
    if(a + b > 0){
        cout << "Overflow\n";
    }else if(a + b == 0){
        cout << (X + a > V ? "Overflow\n" : "Safe\n");
    }else{
        cout << (X + a > V ? "Overflow\n" : "Zero\n");
    }
}
int main(void){
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    
    int t; cin >> t;
    while(t--)solve();
    return 0;
}