#include<bits/stdc++.h>
#define rep(i,n) for(int i=0;i<(int)(n);i++)
using namespace std;

int main() {
    int r=0,b=0;
    string s[3];
    rep(i,3) {
        cin >> s[i];
        if (s[i] == "RED") {
            r++;
        } else {
            b++;
        }
    }

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