#include <iostream>
#include <iomanip>
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;
	}
}