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

int main(){
    string bal[3];
    for(int i = 0; i < 3; i++) cin >> bal[i];
    int red = 0;
    int blue = 0;

    for(int i = 0; i < 3; i++){
        if(bal[i] == "RED") red += 1;
        else blue += 1;
    }

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

    return 0;
}