import java.util.Scanner;

public class Husen {

    public static void main(String[] args) {
	Scanner scanner = new Scanner(System.in);
	int cntB = 0;
	int cntR = 0;
	for(int i=0;i<3;i++){
	    String s = scanner.nextLine();
	    if(s.equals("BLUE")){
		cntB++;
	    }else{
		cntR++;
	    }
	}

	if(cntB > cntR){
	    System.out.println("BLUE");
	}else{
	    System.out.println("RED");
	}

    }

}