#include <bits/stdc++.h>
using namespace std;
const int MN = 1e5 + 5;
int main() {
  ios_base::sync_with_stdio(0), cin.tie(0), cout.tie(0);
  int a;
  string s;
  cin >> a >> s;
  if (a < 3900)
    cout << "red\n";
  else
    cout << s << '\n';
  return 0;
}
