#include <bits/stdc++.h>
using namespace std;
using ll = long long;
void _cin() {}
template <class Head, class... Tail>
void _cin(Head&& head, Tail&&... tail) {
  cin >> head;
  _cin(forward<Tail>(tail)...);
}
void _cout() { cout << "\n"; }
template <class Head, class... Tail>
void _cout(Head&& head, Tail&&... tail) {
  cout << head;
  _cout(forward<Tail>(tail)...);
}
int gcd(int a, int b) { return (b == 0) ? a : gcd(b, a % b); }
int main(void) {
  int a;
  _cin(a);
  string s;
  _cin(s);
  string r = "red";
  _cout((a >= 3200) ? r : s);
}
