package yukicoder;

import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int cntRed = 0 , cntBlue = 0;
		String disp ;
		for(int i = 0 ; i < 3 ; i++){
			if(sc.nextLine().equals("RED")){
				cntRed++;
			}else{
				cntBlue++;
			}
		}
		if(cntRed > cntBlue){
			disp = "RED";
		}else{
			disp = "BLUE";
		}
	    System.out.println(disp);
	}

}