#include <bits/stdc++.h>
using namespace std;
const long long mod = 1e9 + 7;
using ll = long long;
using pii = pair<int, int>;
using pll = pair<ll, ll>;
unsigned long long gcd(unsigned long long a, unsigned long long b) {
  return b ? gcd(b, a % b) : a;
}
unsigned long long lcm(unsigned long long a, unsigned long long b) {
  return a / gcd(a, b) * b;
}
int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  long long a;
  scanf("%lld", &a);
  string s;
  cin >> s;
  if (a >= 3200) {
    cout << s << endl;
  } else {
    cout << "red" << endl;
  }
  return 0;
}
