#include <bits/stdc++.h>
using namespace std;
string tab[] = {"vaporeon", "jolteon", "flareon", "espeon",
                "umbreon",  "leafeon", "glaceon", "sylveon"};
void jebaj() {
  int n;
  string s;
  cin >> n;
  cin >> s;
  for (int i = (0); i <= ((8) - 1); ++i) {
    if ((int)((tab[i]).size()) == (int)((s).size())) {
      int a = 0;
      for (int j = (0); j <= (((int)((s).size())) - 1); ++j) {
        if (s[j] != '.' && s[j] != tab[i][j]) a++;
      }
      if (a == 0) {
        cout << tab[i] << "\n";
        return;
      }
    }
  }
}
int main() {
  ios_base::sync_with_stdio(0);
  int t;
  t = 1;
  for (int i = (0); i <= ((t)-1); ++i) {
    jebaj();
  }
}
