#include <bits/stdc++.h>
using namespace std;
template <class T>
inline void chmax(T& a, T b) {
  if (a < b) {
    a = b;
  }
}
template <class T>
inline void chmin(T& a, T b) {
  if (a > b) {
    a = b;
  }
}
template <class T>
inline T gcd(T x, T y) {
  if (y == 0) {
    return x;
  } else if (x == 0) {
    return y;
  }
  return gcd(y, x % y);
}
template <class T>
inline T lcm(T x, T y) {
  return (x * y) / gcd(x, y);
}
template <class T>
inline vector<T> convert_to_binary_number(T x) {
  vector<T> binary_num;
  while (x != 1) {
    binary_num.push_back(x % 2);
    x /= 2;
  }
  binary_num.push_back(1);
  return binary_num;
}
template <class T>
inline void print_vector(vector<T> vec) {
  for (int i = 0; i < vec.size(); i++) {
    cout << vec[i] << " ";
  }
  cout << endl;
}
const long long MOD = 1e9 + 7;
const long long INF = 1LL << 60;
int main(void) {
  int a;
  string s;
  cin >> a >> s;
  if (3200 <= a)
    cout << s << endl;
  else
    cout << 'red' << endl;
  return 0;
}
