#include<iostream>
#include<string>
using namespace std;

int main(){
  int r=0,b=0;
  string s;
  for(int i=0;i<3;i++){
    cin >> s;
    if(s=="RED")
      r++;
    else
      b++;
  }
  if(r>b)
    cout << "RED" << "\n";
  else
    cout << "BLUE" << "\n";
  return 0;
}