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

namespace _0446
{
    class Program
    {
        static void Main(string[] args)
        {

            var r = 0;
            var b = 0;

            for (var i = 0; i < 3; i++)
            {
                var x = Console.ReadLine();

                if (x == "RED")
                {
                    r++;
                }
                else
                {
                    b++;
                }
            }

            Console.WriteLine(r > b ? "RED" : "BLUE");


        }
    }
}