#include <iostream>
#include <vector>
#include <algorithm>
#include <string>
using namespace std;

int max(int a, int b) {
	int x = (a > b) ? a : b;
	return x;
}

int min(int a, int b) {
	int x = (a < b) ? a : b;
	return x;
}

int main() {
	string s;
	int r=0, b=0;
	for (int i = 0; i < 3; i++) {
		getline(cin, s);
		if (s[0] == 'R') r++;
		else b++;
	}
	(r > b) ? cout << "RED" << endl : cout << "BLUE" << endl;

	return 0;
}