using System;
using System.Collections.Generic;
using System.Linq;
    class Program
    {
        enum Color
        {
            RED,
            BLUE
        }
        static void Main(string[] args)
        {
            int balCnt = 3;
            var bals = new List<string>();

            for (int i=0; i<balCnt; i++)
                    bals.Add(Console.ReadLine());

            var redCnt  =  bals.Count(x => x == Enum.GetName(typeof(Color), Color.RED));
            var blueCnt =  bals.Count(y => y == Enum.GetName(typeof(Color), Color.BLUE));
            var color = (redCnt > blueCnt) ? Enum.GetName(typeof(Color), Color.RED): Enum.GetName(typeof(Color), Color.BLUE);
            Console.WriteLine(color);
        }
    }