import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
	Scanner s = new Scanner(System.in);
	
	String[] str = new String[3];
	str[0]= s.nextLine();
	str[1]= s.nextLine();
	str[2]= s.nextLine();
	int red = 0;
	int blue = 0;
	
	for(int i =0;i<3;i++){
		if(str[i].equals("RED")){
			red++;
		}else{
			blue++;
		}
	}
	if(red>blue){
		System.out.println("RED");
	}else{
		System.out.println("BLUE");
	}
	
	
	}
}