#include <bits/stdc++.h>
using namespace std;
const int MXN = (int)1e6 + 10;
const double EPS = 1e-9;
string pokemons[] = {"vaporeon", "jolteon", "flareon", "espeon",
                     "umbreon",  "leafeon", "glaceon", "sylveon"};
string s;
int n;
int main() {
  ios_base::sync_with_stdio(0);
  cin >> n >> s;
  for (int i = 0; i < 8; ++i) {
    if (n != pokemons[i].length()) continue;
    bool boo = true;
    for (int j = 0; j < n; ++j) {
      if (!(s[j] == pokemons[i][j] || s[j] == '.')) {
        boo = false;
        break;
      }
    }
    if (boo) {
      cout << pokemons[i];
      return 0;
    }
  }
  return 0;
}
