#include <bits/stdc++.h>
using namespace std;
const int MAXN = 1000 + 20;
int n, m;
double a;
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cin >> n;
  string s;
  cin >> s;
  if (n >= 3200)
    cout << n << endl;
  else
    cout << "red" << endl;
  return 0;
}
