#include <bits/stdc++.h>
using namespace std;
int a;
string s;
int main() {
  cin >> a >> s;
  int len = s.length();
  if (a == 3200) {
    for (register int i = 0; i < len; ++i) cout << s[i];
  } else
    puts("red");
  return 0;
}
