#include <bits/stdc++.h>
#define rep(i, n) for (int i = 0; i < n; ++i)
using ll = long long;
using namespace std;
const int INF = 1e9;

int main() {
    int r = 0, b = 0;
    rep(i, 3) {
        string s;
        cin >> s;

        if (s == "RED")
            ++r;
        else
            ++b;
    }

    if (r > b)
        cout << "RED";
    else
        cout << "BLUE";
    cout << endl;

    return 0;
}