#include <bits/stdc++.h>
using namespace std;
int main(void) {
  long long int n, m, i = 0, j, h, a;
  string s;
  cin >> a >> s;
  h = s.size();
  if (a < 3200) {
    cout << "red" << endl;
  } else {
    cout << s << endl;
  }
  return 0;
}
