#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  cin >> n;
  string s;
  cin >> s;
  vector<string> name = {"vaporeon", "jolteon", "flareon", "espeon",
                         "umbreon",  "leafeon", "glaceon", "sylveon"};
  for (int i = 0; i < name.size(); i++) {
    string name_pokemon = name[i];
    if (name_pokemon.size() != n) {
      name[i] = "1";
    }
  }
  for (int i = 0; i < s.size(); i++) {
    if (s[i] != '.') {
      for (int j = 0; j < name.size(); j++) {
        string name_pokemon = name[j];
        if (name_pokemon[i] != s[i] && name_pokemon != "1") {
          name[j] = "1";
        }
      }
    }
  }
  for (int i = 0; i < name.size(); i++) {
    if (name[i] != "1") {
      cout << name[i] << endl;
      break;
    }
  }
  return 0;
}
