#include <bits/stdc++.h>
#pragma GCC optimize("-O3")
using namespace std;
int n;
string t, s[8] = {"vaporeon", "jolteon", "flareon", "espeon",
                  "umbreon",  "leafeon", "glaceon", "sylveon"};
int32_t main() {
  ios::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  ;
  cin >> n >> t;
  for (auto &str : s) {
    if (str.size() != n) continue;
    bool flag = true;
    for (int j = 0; j < n; j++) flag &= ((t[j] == '.') || (str[j] == t[j]));
    if (flag == true) return cout << str, 0;
  }
  return 0;
}
