using System; using System.Collections.Generic; using System.Globalization; using System.IO; using System.Linq; using System.Text; using System.Threading.Tasks; class hawawa { static Printer sw = new Printer(Console.OpenStandardOutput()) { AutoFlush = false }; static void Main() { Console.SetOut(sw); solve(); Console.Out.Flush(); } static void solve() { Scanner scanner = new Scanner(); int red = 0; for(int i = 0; i < 3; i++) { if(scanner.next() == "RED") { red++; } } if(red >= 2) { Console.WriteLine("RED"); } else { Console.WriteLine("BLUE"); } } } class Scanner { string[] s; int i; char[] cs = new char[] { ' ' }; public Scanner() { s = new string[0]; i = 0; } public string next() { if (i < s.Length) return s[i++]; string st = Console.ReadLine(); while (st == "") st = Console.ReadLine(); s = st.Split(cs, StringSplitOptions.RemoveEmptyEntries); i = 0; return next(); } public int nextInt() { return int.Parse(next()); } public long nextLong() { return long.Parse(next()); } public double nextDouble() { return double.Parse(next()); } } class Printer : StreamWriter { public override IFormatProvider FormatProvider { get { return CultureInfo.InvariantCulture; } } public Printer(Stream stream) : base(stream, new UTF8Encoding(false, true)) { } public Printer(Stream stream, Encoding encoding) : base(stream, encoding) { } }