using System;

namespace yukicoder
{
    class Program
    {
        static void Main(string[] args)
        {
            int count = 0;
            int count2 = 0;
            string a = Console.ReadLine();
            string b = Console.ReadLine();
            string c = Console.ReadLine();
            string[] s = new string[3];
            s[0] = a;
            s[1] = b;
            s[2] = c;
            for (int i = 0; i < 3; i++)
            {
                if (s[i] == "RED")
                {
                    count++;
                }
                else
                {
                    count2++;
                }
            }
            if (count > count2)
            {
                Console.WriteLine("RED");
            }
            else
            {
                Console.WriteLine("BLUE");
            }
        }
    }
}