#include <bits/stdc++.h>
std::vector<std::string> xs{"vaporeon", "jolteon", "flareon", "espeon",
                            "umbreon",  "leafeon", "glaceon", "sylveon"};
int main() {
  int n;
  std::string s;
  std::cin >> n >> s;
  for (const auto& x : xs)
    if (s.size() == x.size()) {
      bool ok = true;
      for (int i = 0; i < s.size(); ++i)
        ok = ok && (s[i] == '.' || s[i] == x[i]);
      if (ok) std::cout << x << '\n';
    }
}
