#include <iostream>
#include <algorithm>
#include <cstring>
#include <string>
#include <vector>
#include <queue>
#include <deque>
#include <cmath>

#define AS(a) (sizeof(a)/sizeof(a[0]))
using namespace std;
long long int MOD = 1000000007;
long long int INF = 1000000007;


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

}