#include <bits/stdc++.h>
using namespace std;
string s[] = {"vaporeon", "jolteon", "flareon", "espeon",
              "umbreon",  "leafeon", "glaceon", "sylveon"};
bool match(string a, string b) {
  if (a.length() != b.length()) return false;
  for (int i = 0; i < a.length(); ++i)
    if (a[i] != '.' && a[i] != b[i]) return false;
  return true;
}
int main() {
  int n;
  string a;
  cin >> n >> a;
  for (int i = 0; i < 8; ++i) {
    if (match(a, s[i])) {
      cout << s[i] << endl;
      break;
    }
  }
  return 0;
}
