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