#include <string.h>
#include <algorithm>
#include <array>
#include <bitset>
#include <cassert>
#include <cfloat>
#include <climits>
#include <cmath>
#include <complex>
#include <ctime>
#include <deque>
#include <fstream>
#include <functional>
#include <iomanip>
#include <iostream>
#include <iterator>
#include <list>
#include <map>
#include <memory>
#include <queue>
#include <random>
#include <set>
#include <stack>
#include <string>
#include <unordered_map>
#include <unordered_set>
#include <utility>
#include <vector>
using namespace std;

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    int t;
    cin >> t;
    while(t--) {
        long long V,X;
        cin >> V >> X;
        long long F1,F2,Q,R;
        cin >> F1 >> F2 >> Q >> R;
        long long sum = R*F2-Q*F1,sum2 = R*F2-R*F1;
        if(sum > 0) {
            cout << "Overflow" << "\n";
        }
        else if(X+sum2 > V) {
            cout << "Overflow" << "\n";
        }
        else if(sum == 0) {
            cout << "Safe" << "\n";
        }
        else {
            cout << "Zero" << "\n";
        }
    }
}