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

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