using System;
using System.Linq;

class Program
{
    static void Main(string[] args)
    {
        var input = Console.ReadLine().Split().Select(int.Parse).ToArray();
        var A = input[0];
        var B = input[1];
        var ans = "same";
        if (A > B * 3.6) ans = "KoD";
        else if (A < B * 3.6) ans = "blackyuki";
        Console.WriteLine(ans);
    }
}