import java.util.Scanner;

class no516{
	public static void main(String[] args) {
		Scanner stdIn=new Scanner(System.in);
		String[] s=new String[3];
		for(int i=0;i<3;i++) s[i]=stdIn.next();
		int red=0,blue=0;
		for(int i=0;i<3;i++) {
			if(s[i].equals("RED")) red++;
			else blue++;
		}
		if(red>blue) System.out.println("RED");
		else System.out.println("BLUE");
	}
}