#include <bits/stdc++.h>
using namespace std;
string const t[8] = {"vaporeon", "jolteon", "flareon", "espeon",
                     "umbreon",  "leafeon", "glaceon", "sylveon"};
int n;
string s;
bool ok(string const& a, string const& b) {
  if (a.length() != b.length()) {
    return false;
  }
  for (int i = 0; i < a.length(); ++i) {
    if (a[i] != b[i] && b[i] != '.') {
      return false;
    }
  }
  return true;
}
int main() {
  cin >> n >> s;
  for (int i = 0; i < 8; ++i) {
    if (ok(t[i], s)) {
      cout << t[i];
      return 0;
    }
  }
  cout << "\n";
  return 0;
}
