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

int main() {
	string S;
	int R = 0, B = 0;
	for (int i = 0; i < 3; i++) {
		cin >> S;
		if (S == "RED") R++;
		else B++;
	}
	if (R > B) cout << "RED" << endl;
	else cout << "BLUE" << endl;
}