#include <bits/stdc++.h>
using namespace std;
int siize, i, j, t;
string s;
pair<int, string> a[6];
int main() {
  cin >> siize >> s;
  if (siize == 6) {
    cout << "espeon";
    return 0;
  }
  if (siize == 8) {
    cout << "vaporeon";
    return 0;
  }
  a[0].second = "jolteon";
  a[1].second = "flareon";
  a[2].second = "glaceon";
  a[3].second = "sylveon";
  a[4].second = "umbreon";
  a[5].second = "leafeon";
  for (i = 0; i < 6; i++) {
    for (j = 0; j < 7; j++) {
      if (a[i].second[j] == s[j]) t++;
    }
    a[i].first = t;
    t = 0;
  }
  sort(a, a + 6);
  reverse(a, a + 6);
  cout << a[0].second;
}
