#include "bits/stdc++.h"
using namespace std;
typedef long long ll;
const int MOD = 1e9+7,Pun = 1e6;

int main()
{
    char color[4];
    int r = 0,b = 0;
	while(cin>>color)
	{
    	if(color[0] == 'R') r++;
    	else b++;
	}
	
	cout << (r > b ? "RED" : "BLUE") << endl;
}