#include <bits/stdc++.h>
using namespace std;
 
#define REP(i,n) for (int i=0,_n=(int)(n); i < _n; i++)
template<class T> bool chkmin(T &a, T b) { return a > b ? (a = b, true) : false; }
template<class T> bool chkmax(T &a, T b) { return a < b ? (a = b, true) : false; }

typedef long long ll;


int main2() {

  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;

  return 0;
}

int main() {
  for (;!cin.eof();cin>>ws) main2();
  return 0;
}