public class Program
{
    public static void Main()
    {
        //int num = int.Parse(Console.ReadLine() ?? string.Empty);
        //string[] str = (Console.ReadLine() ?? string.Empty).Trim().Split(' ');
        string str = Console.ReadLine() ?? string.Empty;
        string str2 = Console.ReadLine() ?? string.Empty;
        string str3 = Console.ReadLine() ?? string.Empty;

        int count = 0;

        if(str == "RED")
        {
            count++;
        }
        else
        {
            count--;
        }
        if(count > 0)
        {
            Console.WriteLine("RED");
        }
        else
        {
            Console.WriteLine("BLUE");
        }

    }
}