#include <bits/stdc++.h>
#define rep(i,n) for (int i=0; i<(n); ++i)
using namespace std;
using ll=long long;
int main(){
    int r=0,b=0;
    rep(i,3){
        string s;
        cin>>s;
        if(s=="RED")r++;
        else b++;
    }
    cout<<(r>b?"RED":"BLUE")<<endl;
}