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