using System;
using System.Collections.Generic;

namespace test
{
    static class Program
    {
        static void Main()
        {
            string[] a = Console.ReadLine().Split(' ');
            double b = double.Parse(a[0]);
            double c = double.Parse(a[1]);
            if (b > c * 3.6)
            {
                Console.WriteLine("KoD");
            }else if(b < c * 3.6)
            {
                Console.WriteLine("blackyuki");
            }
            else
            {
                Console.WriteLine("same");
            }
        }
    }
}