import java.util.*;

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