#include "bits/stdc++.h"
using namespace std;
using Graph = vector<vector<int>>;
typedef long long ll;
typedef pair<ll, ll> P;
#define rep(i,n) for (ll i = 0; i < (n); ++i)
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
const long long mod = 1e9 + 7;

ll gcd(ll a, ll b) {
	return b ? gcd(b, a % b) : a;
}

ll lcm(ll a, ll b) {
	return a / gcd(a, b) * b;
}

int main() {
	ll r=0,b=0;

	rep(i, 3) {
		string s;
		cin >> s;
		if (s == "RED") {
			r++;
		} else {
			b++;
		}
	}

	if (r > b) {
		cout << "RED" << endl;
	} else {
		cout << "BLUE" << endl;
	}
}