#include <iostream>
using namespace std;

int main(){
    string col; int blue = 0; int red = 0;
    for(int i = 0; i < 3; i++){ cin >> col; col == "RED" ? red += 1 : blue += 1; }
    cout << (red < blue ? "BLUE" : "RED") << endl;
    return 0;
}