//No.516 赤と青の風船
#include<iostream>
#include<string>
using namespace std;

int main()
{
	int num[2] = {0,0};
	string str;
	for (int i = 0; i < 3; i++) {
		cin >> str;
		if (str == "RED")num[0]++;
		else num[1]++;
	}
	if (num[0] > num[1])cout << "RED"<<endl;
	else cout << "BLUE" << endl;
	return 0;
}