import java.util.Scanner;

class A{
	static Scanner s=new java.util.Scanner(System.in);
	public static void main(String[]__){
		int r=0,b=0;
		for(int i=0;i<3;i++)
			if(s.next().equals("RED"))r++;else b++;
		System.out.println(r>b?"RED":"BLUE");
	}
}