#include <iostream>
#include <vector>
#include <algorithm>
#include <string>
using namespace std;

int main()
{
	int r=0, b=0;
	for (int i = 0; i < 3; i++) {
		string s; cin >> s;
		if (s == "RED")r++;
		else b++;
	}

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

    return 0;
}