#include <bits/stdc++.h>
using namespace std;
template <typename T>
istream& operator>>(istream& is, vector<T>& vec) {
  for (T& x : vec) is >> x;
  return is;
}
int main() {
  int a, i;
  vector<char> s;
  cin >> a >> s;
  if (a >= 3200) {
    for (i = 0; i < s.size(); i++) {
      cout << s[i];
    }
    cout << endl;
  } else {
    cout << "red" << endl;
  }
}
