#include <bits/stdc++.h>
using namespace std;
vector<pair<int, char> > v;
string a[8] = {"vaporeon", "jolteon", "flareon", "espeon",
               "umbreon",  "leafeon", "glaceon", "sylveon"};
int main() {
  int n;
  cin >> n;
  string s;
  cin >> s;
  for (int i = 0; i < s.size(); i++) {
    if (s[i] != '.') v.push_back(make_pair(i, s[i]));
  }
  for (int i = 0; i < 8; i++) {
    int isok = 1;
    if (a[i].size() == s.size()) {
      for (int j = 0; j < v.size(); j++) {
        if (a[i][v[j].first] != v[j].second) {
          isok = 0;
        }
      }
      if (isok) {
        cout << a[i];
        return 0;
      }
    }
  }
}
