#include <iostream>
#include <string>
using namespace std;
int main(int argc, char* argv[])
{
	string S;
	int r=0,b=0;
	while (true){
		cin>>S;
		if (cin.eof()){
			break;
		}
		if (!S.compare("RED")){
			r++;
		}else{
			b++;
		}
	}
	if (r>b){
		cout<<"RED"<<endl;
	}else{
		cout<<"BLUE"<<endl;
	}

	return 0;
}