#include <iostream>
using namespace std;

int main(){
	int a[2]{};
	string s;
	cin >> s;
	a[s == "BLUE"]++;
	cin >> s;
	a[s == "BLUE"]++;
	cin >> s;
	a[s == "BLUE"]++;
	cout << (a[0] < a[1] ? "BLUE" : "RED") << endl;
}