#include <iostream>
#include <math.h>
#include <algorithm>
#include <functional>
#include <vector>
#include <typeinfo>
#include <climits>
#include <ctype.h>
#include <string>
#include <stdio.h>
using namespace std;
#define INIT cin.tie(0); ios::sync_with_stdio(false);
#define FOR(i, a, n) for (int i = a; i < n; i++)
#define REP(i, n) for(int i = 0; i < n; i++)

int main()
{
    INIT;

    string S[3];
    REP(i, 3) cin >> S[i];

    int r = 0, b = 0;
    REP(i, 3){
        if(S[i] == "RED") r++;
        else b++;
    }
    if(r > b) cout << "RED" << endl;
    else cout << "BLUE" << endl;

    return 0;
}