#include "bits/stdc++.h"
using namespace std;
#define all(x) begin(x),end(x)
template<typename A, typename B> ostream& operator<<(ostream &os, const pair<A, B> &p) { return os << '(' << p.first << ", " << p.second << ')'; }
template<typename T_container, typename T = typename enable_if<!is_same<T_container, string>::value, typename T_container::value_type>::type> ostream& operator<<(ostream &os, const T_container &v) { string sep; for (const T &x : v) os << sep << x, sep = " "; return os; }
#define debug(a) cerr << "(" << #a << ": " << a << ")\n";
typedef long long ll;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef pair<int,int> pi;
const int mxN = 1e5+1, oo = 1e9;

void solve() {
    ll x,v; cin >> v >> x;
    ll fo,fi; cin >> fo >> fi;
    ll r,q; cin >> q >> r;
    // increasing, than decreasing.
    if(fo>=fi) {
        cout << "Overflow\n";
        return;
    }
    ll percycle = fo*q - fi*r;
    ll minpercycle = fo*r-fi*r;
    if(minpercycle+x<=0) {
        cout << "Zero\n";
        return;
    }
    if(percycle>0) {
        
        cout << "Overflow\n";
    } else if(percycle==0) cout << "Safe\n";
    else cout << "Zero\n";
}

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    int t; cin >> t;
    while(t--) solve();
}