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

int main() {
	map<string, int> mp;
	for(int i = 0; i < 3; ++i) {
		string s; cin >> s;
		mp[s]++;
	}
	cout << (mp["RED"] > mp["BLUE"] ? "RED" : "BLUE") << '\n';
	return 0;
}