#include <bits/stdc++.h>
using namespace std;
using ll = long long int;
template <class T>
ostream &operator<<(ostream &os, vector<T> &v) {
  for (auto i = v.begin(); i != v.end(); i++) {
    os << *i << " ";
  }
  return os;
}
ll gcd(ll a, ll b) {
  ll tmp;
  if (b > a) {
    tmp = a;
    a = b;
    b = tmp;
  }
  while (a % b != 0) {
    tmp = b;
    b = a % b;
    a = tmp;
  }
  return b;
}
ll lcm(ll a, ll b) { return a * b / gcd(a, b); }
int main(void) {
  int a;
  string s;
  cin >> s;
  cin >> a;
  if (a >= 3200)
    std::cout << s << std::endl;
  else
    std::cout << "red" << std::endl;
  return 0;
}
