#include <bits/stdc++.h>
#pragma GCC target("avx2")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
using namespace std;
using ll = long long;
const ll mod = 998244353;
#define fi first
#define se second
#define rep(i,n) for(ll i=0;i<n;i++)
#define all(x) x.begin(),x.end()
#define faster ios::sync_with_stdio(false);cin.tie(nullptr)

int main() {
    ll T;
    cin >> T;
    while(T--){
        ll V,X,Fo,Fi,Q,R;
        cin >> V >> X >> Fo >> Fi >> Q >> R;
        ll cnt1=Fi*R-Fo*R;
        ll cnt2=Fi*R-Fo*Q;
        if(cnt2>0){
            cout << "Overflow" << endl;
        }else if(X+cnt1>V){
            cout << "Overflow" << endl;
        }else if(cnt2<0){
            cout << "Zero" << endl;
        }else{
            cout << "Safe" << endl;
        }
    }
    return 0;
}