#include <bits/stdc++.h>
using namespace std;
const int inf = 1e9 + 5;
int n;
string s;
string t[] = {"vaporeon", "jolteon", "flareon", "espeon",
              "umbreon",  "leafeon", "glaceon", "sylveon"};
bool ok(string a, string b) {
  int n = a.size();
  int m = b.size();
  if (n != m) return 0;
  for (int i = 0; i <= n - 1; i++)
    if (a[i] != b[i] and b[i] != '.') return 0;
  return 1;
}
int main() {
  ios ::sync_with_stdio(0);
  cin >> n >> s;
  for (int i = 0; i <= 7; i++)
    if (ok(t[i], s)) {
      cout << t[i] << '\n';
      return 0;
    }
  return 0;
}
