#include <bits/stdc++.h>
using namespace std;
const long long int INF = 10000000000000;
int main() {
  int N;
  string s;
  cin >> N;
  cin >> s;
  if (N >= 3200)
    cout << s << endl;
  else
    cout << 'red' << endl;
  return 0;
}
