#include<cstdio>
#include <iostream>
#include<algorithm>
#include<string>
#include<queue>
#include<vector>
#include<functional>
#include<cmath>
#include<map>
#include<stack>
#include<set>
#include<numeric>

using namespace std;
typedef long long ll;
typedef pair<int, int> Pr;

string s1, s2, s3;
int red,blue;

int main()
{
	for (int i = 0; i < 3; i++) {
		string s;
		cin >> s;
		if (s == "RED")red++;
		else if (s == "BLUE")blue++;
	}
	if (red > blue)cout << "RED" << endl;
	else cout << "BLUE" << endl;
	return 0;
}