/* -*- coding: utf-8 -*-
 *
 * 516.cc: No.516 赤と青の風船 - yukicoder
 */

#include<cstdio>
#include<cstdlib>
#include<cstring>
#include<cmath>
#include<iostream>
#include<string>
#include<vector>
#include<map>
#include<set>
#include<stack>
#include<list>
#include<queue>
#include<deque>
#include<algorithm>
#include<numeric>
#include<utility>
#include<complex>
#include<functional>
 
using namespace std;

/* constant */

const int N = 3;

/* typedef */

/* global variables */

/* subroutines */

/* main */

int main() {
  int rn = 0, bn = 0;

  for (int i = 0; i < N; i++) {
    string s;
    cin >> s;
    if (s == "RED") rn++;
    else bn++;
  }

  if (rn > bn) puts("RED");
  else puts("BLUE");
  return 0;
}