#include <bits/stdc++.h>
using namespace std;
template <class T>
T inline sqr(T x) {
  return x * x;
}
const long double pi = 3.1415926535897932384626433832795;
const long double eps = 1e-8;
const string a[8] = {"vaporeon", "jolteon", "flareon", "espeon",
                     "umbreon",  "leafeon", "glaceon", "sylveon"};
int main() {
  int n;
  string s;
  cin >> n;
  cin >> s;
  for (int i = 0; i < (int)(8); ++i) {
    string c = a[i];
    if (c.length() == s.length()) {
      bool ok = 1;
      for (int j = 0; j < (int)(c.length()); ++j)
        if (s[j] != '.' && s[j] != c[j]) ok = false;
      if (ok) cout << c << endl;
    }
  }
  return 0;
}
