#include <bits/stdc++.h>
const long long INF = (long long)1e18 + 18;
const long long maxn = (long long)1e6 + 6;
using namespace std;
long long a;
string s;
signed main() {
  cin >> a >> s;
  if (a >= 3200)
    cout << "red" << endl;
  else
    cout << s << endl;
  return 0;
}
