using System;

public class Hello
{
    static void Main()
    {
        var T = int.Parse(Console.ReadLine().Trim());
        while (T-- > 0)
        {
            string[] line = Console.ReadLine().Trim().Split(' ');
            var fo = int.Parse(line[2]);
            var fi = int.Parse(line[3]);
            var q = int.Parse(line[4]);
            var r = int.Parse(line[5]);
            getAns(fo, fi, q, r);
        }
    }
    static void getAns(int fo, int fi, int q, int r)
    {
        var fout = fo * q;
        var fin = fi * r;
        var ans = "Safe";
        if (fout > fin) ans = "Zero";
        else if (fout < fin) ans = "Overflow";
        Console.WriteLine(ans);
    }
}