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

int main(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    int T;
    cin >> T;
    while(T--){
        ll v, x, f0, f1, q, r, f2;
        cin >> v >> x >> f0 >> f1 >> q >> r;
        f2 = f1 - f0;
        if(x + f2 * r > v){
            cout << "Overflow\n";
            continue;
        }
        ll d = f2 * r - f0 * (q - r);
        if(x + d <= 0){
            cout << "Zero\n";
            continue;
        }
        if(d > 0){
            cout << "Overflow\n";
        }else if(d < 0){
            cout << "Zero\n";
        }else{
            cout << "Safe\n";
        }
    }
}