import java.util.*;

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