#define _USE_MATH_DEFINES

#include <iostream>	//cin, cout
#include <vector>	//vector
#include <algorithm> //sort,min,max,count
#include <string>	//string,getline
#include <ios>		//fixed
#include <iomanip>	//setprecision
#include <utility> //swap
#include <cstdlib>	//abs(int)
#include <cmath>	//sqrt
#include <sstream>	//stringstream,getline
#include <cmath>	//ceil,M_PI
#include <numeric>	//gcd

using namespace std;

int main() {

	string S;
	int r = 0;
	int b = 0;

	for (int i = 0; i < 3; i++) {
		cin >> S;
		if (S[0] == 'R') {
			r++;
		}
		else {
			b++;
		}
	}

	if (r > b) {
		cout << "RED" << endl;
	}
	else {
		cout << "BLUE" << endl;
	}

	return 0;

}