//#define LOCAL

#include <fstream>
#include <iostream>
#include <cmath>
#include <algorithm>
#include <vector>
#include <map>
#include <queue>
#include <cstring>

#define int long long
//typedef long long ll;
#define rep(i,n) for(int i=0; i<(n); i++)

using namespace std;

int red, blue;

signed main()
{
#ifdef LOCAL
    ifstream in("input.txt");
    cin.rdbuf(in.rdbuf());
#endif

    string in;

    rep(i,3) {
        cin >> in;
        if (in == "RED") {
            red++;
        } else {
            blue++;
        }
    }

    if (red > blue) {
        cout << "RED" << endl;
    } else {
        cout << "BLUE" << endl;
    }
}