#include <bits/stdc++.h>
using namespace std;
int gcd(int, int);
int main() {
  int a;
  string s;
  cin >> a >> s;
  if (a >= 3200)
    cout << a << endl;
  else
    cout << "red" << endl;
}
int gcd(int a, int b) { return b ? gcd(b, a % b) : a; }
