#include <bits/stdc++.h>
using namespace std;
using pi = pair<int, int>;
using vi = vector<int>;
using ld = long double;
int main() {
  int a;
  string s;
  if (a >= 3200) {
    cout << s << endl;
  } else {
    cout << 'red' << endl;
  }
  return 0;
}
