#include <iostream>
#include <algorithm>
#include <string>
#include <cstdio>
using namespace std;

int main()
{
    int f = 0;
    for (int i = 0; i < 3; i++) {
        string s;
        cin >> s;
        f += (s == "RED" ? 1 : -1);
    }
    cout << (f > 0 ? "RED" : "BLUE") << endl;

    return 0;
}