#include<bits/stdc++.h>
#include<atcoder/all>
#define chmin(x,y) (x) = min((x),(y))
#define chmax(x,y) (x) = max((x),(y))
#define ld long double
using namespace std;
using namespace atcoder;
using ll = long long;
const ll mod = 998244353;
using mint = modint998244353;
using Graph = vector<vector<pair<int,int>>>;
const vector<int> dx = {1,0,-1,0}, dy = {0,1,0,-1};

int main(){
  // input
  int t; cin >> t;
  while(t--){
    ll v,x,fo,fi,q,r;
    cin >> v >> x >> fo >> fi >> q >> r;
    ll y = x - fo * q + fi * r;
    if(x - fo * r + fi * r > v) cout << "Overflow" << endl;
    else if(y < x) cout << "Zero" << endl;
    else if(y > x) cout << "Overflow" << endl;
    else cout << "Safe" << endl;
  }
}