using System;
using System.Linq;
using System.Collections;
using System.Collections.Generic;
namespace Paiza
{
    static class Problem
    {
        static void Main (string[] args)
        {
            int[] AB = Console.ReadLine().Split(' ').Select(int.Parse).ToArray();
            int Ajm = AB[0] * 1000;
            int Bjm = AB[1] * 60 * 60;
            if (Ajm == Bjm)
            {
                Console.WriteLine("same");
            }
            else
            {
                Console.WriteLine(Ajm < Bjm ? "blackyuki" : "KoD");
            }
        }
    }

}