using System;

public class Hello
{
    static void Main()
    {
        string[] line = Console.ReadLine().Trim().Split(' ');
        var a = long.Parse(line[0]);
        var b = long.Parse(line[1]);
        a *= 1000;
        b *= 3600;
        string ans;
        if (a > b) ans = "KoD";
        else if (a < b) ans = "blackyuki";
        else ans = "same";
        Console.WriteLine(ans);
    }
}