#include <bits/stdc++.h>
using namespace std;
string cadena[] = {"vaporeon", "jolteon", "flareon", "espeon",
                   "umbreon",  "leafeon", "glaceon", "sylveon"};
int n;
int main() {
  string input;
  cin >> n;
  cin >> input;
  for (int i = 0; i < 8; i++) {
    if (cadena[i].size() == n) {
      bool puedo = true;
      for (int j = 0; j < cadena[i].size(); j++) {
        if (input[j] != '.' && input[j] != cadena[i][j]) {
          puedo = false;
          break;
        }
      }
      if (puedo) {
        cout << cadena[i] << "\n";
        return 0;
      }
    }
  }
  return 0;
}
