#include <bits/stdc++.h>
using namespace std;
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(0);
  cout.tie(0);
  ;
  long a;
  string s;
  while (cin >> s) {
    if (a >= 3200)
      cout << "red" << endl;
    else
      cout << s << endl;
  }
}
