#include "bits/stdc++.h"

using namespace std;
using ll = long long;
using IP = pair<int, int>;


#define INF 999999999
#define atcoder(int)1e9+7
#define Endl endl

int main() {
	string s;
	int c1 = 0, c2 = 0;

	for (int i = 0; i < 3; i++) {
		cin >> s;
		if (s == "RED")c1++;
		else c2++;
	}
	if (c1 > c2)cout << "RED" << endl;
	else cout << "BLUE" << endl;

	return 0;
}