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

signed main() {
  int R = 0;
  int B = 0;
  
  string S;
  for( int i = 0; i < 3; i++ ){
    cin >> S;
    if( S == "RED" ) R++;
    else B++;
  }
  if( R > B ) cout << "RED" << endl;
  else cout << "BLUE" << endl;
}