#include <iostream>
#include <vector>
#include <algorithm>
#include <cmath>
#include <iomanip>
#include <stack>
#include <algorithm>
#include <string>
#include <map>
#include <iterator>
#include <set>
#include <queue>

using namespace std;


int main() {

    string s;
    int r=0;
    int b=0;
    for (int i = 0; i < 3; ++i) {
        cin >> s;
        if(s == "RED") {
            r += 1;
        } else {
            b += 1;
        }
    }

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

    return 0;
}