#include <iostream>
#include <stdio.h>
#include <algorithm>
#include <vector>
#include <cmath>
#include <string>
#include <sstream>
#include<sstream>
#include <queue>
#include <limits>
#include <cstdlib>
#include <deque>
#include <map>
#include <set>
using namespace std;

int main() {

	int red =0;
	int blue =0;

	string s;

	for(int i=0; i<3; i++){
		cin>>s;
		if(s == "RED"){
			red++;
		}else {
			blue++;
		}
	}

	if(red > blue){
		cout<<"RED"<<endl;
	}else {
		cout<<"BLUE"<<endl;
	}
	return 0;
}