#include <bits/stdc++.h>
using namespace std;

int main() {
  int red = 0, blue = 0;
  for (int i = 0; i < 3; i++) {
    string s;
    cin >> s;
    if (s == "RED") red++;
    else blue++;
  }
  cout << ((red > blue) ? "RED" : "BLUE") << endl;
  return 0;
}