#include <bits/stdc++.h>
using namespace std;

int main() {
	int r, b;
	r = 0;
	b = 0;
	for (int i = 0; i < 3; i++) {
		string s;
		cin >> s;
		if (s == "RED") {
			r++;
		}
		else {
			b++;
		}
	}

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