#include<iostream>
#include<string>
using namespace std;
int main() {
	string color[3];
	int i;
	int red=0, blue=0;
	for (int i = 0; i < 3; i++) {
		cin >> color[i];
		if (color[i] == "RED") {
			red++;
		}
		else if (color[i] == "BLUE") {
			blue++;
		}
	}
	if (red > blue) {
		cout << "RED";
	} else {
		cout << "BLUE";
	}
	return 0;
}