#include <iostream>
#define rep(i,n) for(int i=0;i<n;++i)
using namespace std;
int main(void){
    string a;
    int blue=0,red=0;
    rep(i,3){
        cin >> a;
        if (a=="RED")
            red++;
        else
            blue++;
    }
    cout << ((red>blue)?"RED":"BLUE") << endl;
}