#include <bits/stdc++.h>
using namespace std;
long long int power(long long int a, long long int b, long long int m) {
  if (b == 0) return (1);
  long long int sol = power(a, b / 2, m);
  sol = (sol * sol) % m;
  if (b % 2 == 1) sol = (sol * a) % m;
  return (sol);
}
long long int gcd(long long int a, long long int b) {
  if (b == 0)
    return a;
  else {
    return gcd(b, a % b);
  }
}
void solve() {
  string s;
  int a;
  cin >> a;
  if (a < 3200) {
    cout << "red";
  } else {
    cout << s;
  }
}
int main() {
  int t = 1;
  while (t--) solve();
  return 0;
}
