#include<iostream>
using namespace std;
int main() {
	int r = 0, b = 0;
	for (int i = 0; i < 3; i++) {
		char s[5]; cin >> s;
		if (s[0] == 'R')r++; else b++;
	}
	if (r > b)cout << "RED\n"; else cout << "BLUE\n";
}