#include <bits/stdc++.h>
using namespace std;
const long long MOD = 1e9 + 7;
const long long INF = 1e9;
const long long IINF = 1e18;
const double EPS = 1e-8;
const double pi = acos(-1);
template <class T>
inline bool chmin(T &a, T b) {
  if (a > b) {
    a = b;
    return true;
  }
  return false;
}
template <class T>
inline bool chmax(T &a, T b) {
  if (a < b) {
    a = b;
    return true;
  }
  return false;
}
int main() {
  cin.tie(0);
  ios::sync_with_stdio(false);
  int a;
  string s;
  cin >> a >> s;
  if (a <= 3200)
    cout << s << endl;
  else
    cout << "red" << endl;
}
