import java.util.*;

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++) {
            if (sc.next().charAt(0) == 'R') {
                red++;
            } else {
                blue++;
            }
        }
        if (red > blue) {
            System.out.println("RED");
        } else {
            System.out.println("BLUE");
        }
    }
}