#include <bits/stdc++.h>
using namespace std;
//#include <atcoder/all>
//using namespace atcoder;
//using mint = modint998244353;
//using mint = modint1000000007;
typedef long long ll;
typedef unsigned long long ull;
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
const int MAX = 1e9;
const int MIN = -1*1e9;
const ll MAXLL = 1e18;
const ll MINLL = -1*1e18;
//const ll MOD = 998244353;
//const ll MOD = 1000000007;

int main()
{
    int T; cin >> T;
    for(int t = 0; t < T; t++)
    {
        ll V,X,F_O,F_I,Q,R; cin >> V >> X >> F_O >> F_I >> Q >> R;
        V += F_I*R;
        
        ll C = Q-(Q-R);
        if(F_O*Q == F_I*C) cout << "Safe" << endl;
        else cout << (F_O*Q < F_I*C ? "Overflow" : "Zero") << endl;   
    }
    return 0;
}