#include<bits/stdc++.h>
using namespace std;
#define int long long

signed main(){

	vector<string> s(3);
	for(int i = 0; i < 3; i++)cin >> s[i];
	int rcount = 0;
	int bcount = 0;
	for(int i = 0; i < 3; i++){
		if(s[i] == "RED")rcount++;
		else bcount++;
	}
	if(rcount > bcount)cout << "RED" << endl;
	else cout << "BLUE" << endl;
}