import java.util.*;

class Main {
    public static void main(String[] args) {
        int r = 0, b = 0;

        Scanner in = new Scanner(System.in);
        String s1 = in.next();
        if(s1.equals("RED")) r++;
        else b++;

        String s2 = in.next();
        if(s2.equals("RED")) r++;
        else b++;

        String s3 = in.next();
        if(s3.equals("RED")) r++;
        else b++;

        if(r > b) System.out.println("RED");
        else System.out.println("BLUE");
    }
}