#include <bits/stdc++.h>
#define rep(i,n)for(long long i=0;i<(n);i++)
using namespace std;
typedef unsigned long long ull;
typedef long long ll;
const ll INF=1e18;
const int MOD=1e9+7;
const double pi=acos(-1);

int main(){
  int r=0,b=0;
  rep(i,3){
    string s;
    cin >> s;
    if(s[0]=='R')r++;
    else b++;
  }
  if(r>b)cout << "RED" << endl;
  else cout<<"BLUE" << endl;
}