import java.util.*;

public class Main {
	static Scanner sc = new Scanner(System.in);
	public static void main(String[] args) {
		int red_num = 0;
		int blue_num = 0;
		for (int i=0; i<3; i++) {
			String s = sc.next();
			if (s.equals("RED")) {red_num++;}
			else {blue_num++;}
		}
		System.out.println(red_num>blue_num?"RED":"BLUE");
	}
}