#include <bits/stdc++.h>
using namespace std;
const int INF = 1e9;
const long long LLINF = 1e18;
const int MOD = 1000000007;
int main() {
  int n;
  cin >> n;
  string s = n >= 3200 ? to_string(n) : "red";
  cout << s << endl;
}
