#include<iostream>
#include<string>
#include<vector>
#include<algorithm>
#include<map>
#define all(x) x.begin(),x.end()
#define pb push_back
#define ll long long 
#define P pair<int,int>
#define LP pair<ll,ll>
using namespace std;
int main() {
	int a=0,b=0;
	for (int i = 0; i < 3; i++) {
		string s;
		cin >> s;
		if (s == "RED") a++;
		else b++;
	}
	if (a > b) cout << "RED" << endl;
	else cout << "BLUE" << endl;

	return 0;
}