import java.util.Scanner;

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