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

int main(void) {

	//std::ifstream inf("Text.txt");	std::cin.rdbuf(inf.rdbuf());
	std::string T;

	int sum = 0;
	for (int i = 0; i < 3; i++) {
		std::cin >> T;
		sum += T.length();
	}

	if (sum < 11) {
		std::cout << "RED" << std::endl;
	}
	else {
		std::cout << "BLUE" << std::endl;
	}

	return 0;
}