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

namespace programPractice
{
    class Program
    {
        static void Main(string[] args)
        {
            int r = 0;
            int b = 0;
            for (int i = 0; i < 3; i++)
            {
                string a = Console.ReadLine();
                if (a.Equals("RED"))
                {
                    r++;
                } else
                {
                    b++;
                 }
            }
            if (r < b)
            {
                Console.WriteLine("BLUE");
            } else
            {
                Console.WriteLine("RED");
            }
        }
    }
}