#include <iostream>
#include <vector>
#include <algorithm>
#include <queue>

using namespace std;

int main(){
  string a;
  int r = 0;
  int b = 0;
  for (int i = 0; i < 3; ++i){
    cin >> a;
    if (a == "RED"){
      ++r;
    }else{
      ++b;
    }
  }

  if (r > b){
    cout << "RED" << endl;
  }else{
    cout << "BLUE" << endl;
  }

  return 0;
}