using System;
class Program{
    static void Main(){
        string[] s = Console.ReadLine().Split(' ');
        long a = int.Parse(s[0]);
        long b = int.Parse(s[1]);
        string ans = "same";
        if(a * 10 > b * 36){
            ans = "KoD";
        } else if (a * 10 < b * 36){
            ans = "blackyuki";
        }
        Console.WriteLine(ans);
    }
}