// 

#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;

using ll = long long;

#define rep(i, n) for (int i=0; i<(int)(n); ++(i))
#define rep3(i, m, n) for (int i=(m); (i)<(int)(n); ++(i))
#define repr(i, n) for (int i=(int)(n)-1; (i)>=0; --(i))
#define rep3r(i, m, n) for (int i=(int)(n)-1; (i)>=(int)(m); --(i))
#define all(x) (x).begin(), (x).end()

const int INF = (int)(1e9);

int main() {
	int t0;
	cin >> t0;
	rep(i0, t0) {
		ll v, x;
		int fo, fi, q, r;
		cin >> v >> x >> fo >> fi >> q >> r;
		if (x+(ll)(fi-fo)*r > v) cout << "Overflow" << endl;
		else if (x+(ll)(fi-fo)*r-(ll)fo*(q-r) <= 0) cout << "Zero" << endl;
		else if ((ll)(fi-fo)*r-(ll)fo*(q-r) > 0) cout << "Overflow" << endl;
		else if ((ll)(fi-fo)*r-(ll)fo*(q-r) < 0) cout << "Zero" << endl;
		else cout << "Safe" << endl;
	}
	return 0;
}