#include <iostream>
#include <string>
#include <vector>

using namespace std;

int main(){
	vector<string> v;
	string s;

	for(int i=0;i<3;i++){
		cin>>s;
		v.push_back(s);
	}
	

	int red=0;
	int blue=0;

	for(int i=0;i<3;i++){
		if(v[i]=="RED")red++;
		else if(v[i]=="BLUE")blue++;
	}

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