#include <iostream>
#include <vector>
#include <algorithm>
#include <array>
#include <iterator>
#include <string>
#include <cctype>
#include <cstring>
#include <cstdlib>
#include <cassert>
#include <cmath>
#include <ctime>
#include <iomanip>
#include <numeric>
#include <stack>
#include <queue>
#include <map>
#include <unordered_map>
#include <set>
#include <unordered_set>
#include <bitset>
#include <random>
#include <utility>
#include <functional>
using namespace std;
void Main()
{
	long long V,X,Fo,Fi,Q,R;
	cin >> V >> X >> Fo >> Fi >> Q >> R;
	if(Fi <= Fo)
	{
		cout << "Zero\n";
	}
	else
	{
		if((Fi - Fo) * R + X > V)
		{
			cout << "Overflow\n";
		}
		else
		{
			long long val = (Fi - Fo) * R - Fo * (Q - R);
			cout << (val > 0 ? "Overflow\n" : val == 0 ? "Safe\n" : "Zero\n");
		}
	}
}
int main()
{
	ios::sync_with_stdio(false);
	cin.tie(nullptr);
	int tt = 1;
	cin >> tt;
	while(tt--) Main();
}