#include <bits/stdc++.h>
using namespace std;
int n;
string names[8] = {"vaporeon", "jolteon", "flareon", "espeon",
                   "umbreon",  "leafeon", "glaceon", "sylveon"};
int matches(string a, string b) {
  if ((int)(a.size()) != (int)(b.size())) return false;
  for (int i = 0; i < n; i++) {
    if (a[i] != '.' && a[i] != b[i]) return 0;
  }
  return 1;
}
int main(int argc, char const *argv[]) {
  string s;
  cin >> n >> s;
  for (int i = 0; i < 8; ++i)
    if (matches(s, names[i])) {
      cout << names[i] << '\n';
      break;
    }
  return 0;
}
