#include <bits/stdc++.h>
using namespace std;
const int maxn = 1e6 + 7;
long long read() {
  long long ans = 0, f = 1;
  char ch = getchar();
  for (; ch < '0' || ch > '9'; ch = getchar())
    if (ch == '-') f = -1;
  for (; ch >= '0' && ch <= '9'; ch = getchar())
    ans = (ans << 3) + (ans << 1) + ch - '0';
  return ans * f;
}
int main() {
  ios::sync_with_stdio(false);
  long long tem;
  string s;
  tem = read();
  cin >> s;
  if (tem >= 3200)
    cout << s;
  else
    cout << "red";
  return 0;
}
