#include <iostream>
#include <cstdlib>

using namespace std;

int main()
{
    string s[3];
    for(int i=0;i<3;i++){
        cin >> s[i];
    }
    int red=0,blue=0;
    for(int i=0;i<3;i++){
        if(s[i]=="RED")red++;
        else blue++;
    }
    if(red>blue)cout<<"RED"<<endl;
    else cout<<"BLUE"<<endl;
}