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

namespace yukicoderTest
{
    class Program
    {
        static void Main(string[] args)
        {
            int rcnt = 0;
            int bcnt = 0;
            for (int i=0;i<3;i++)
            {
                string input = Console.ReadLine();
                if(input=="RED")
                {
                    rcnt++;
                }
                else
                {
                    bcnt++;
                }
            }
            if(rcnt>bcnt)
            {
                Console.WriteLine("RED");
            }
            else
            {
                Console.WriteLine("BLUE");
            }
            
            
        }
    }
}