using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace chess
{
    class Program
    {
        static void Main(string[] args)
        {
            char a,c;
            short b;
            a = Convert.ToChar(Console.Read());
            c = Convert.ToChar(Console.Read());
            b = Convert.ToInt16(Console.Read());
            if ((Convert.ToInt16(a) + b) % 2 == 0)
            {
                Console.WriteLine("CHERNOE");
            }
            else
            {
                Console.WriteLine("BELOE");
            }
        }
    }
}