#include <bits/stdc++.h>
using namespace std;
template <typename t1, typename t2>
ostream& operator<<(ostream& os, const pair<t1, t2>& a) {
  os << a.first << ' ' << a.second;
  return os;
}
template <typename typ>
void vout(vector<typ>& v) {
  for (int vint = 0; vint < (int)(v).size(); vint++) {
    cout << (v)[vint];
    if (vint == (int)(v).size() - 1)
      cout << '\n';
    else
      cout << ' ';
  }
}
template <typename typ>
void arrout(typ* arr, int l) {
  for (int i = 0; i < l; i++) {
    cout << arr[i];
    if (i < l - 1)
      cout << ' ';
    else
      cout << '\n';
  }
}
struct debugger {
  template <typename T>
  debugger& operator,(const T& v) {
    cerr << v << " ";
    return *this;
  }
} dbg;
int main() {
  std::ios_base::sync_with_stdio(false);
  string arr[8] = {"vaporeon", "jolteon", "flareon", "espeon",
                   "umbreon",  "leafeon", "glaceon", "sylveon"};
  int n;
  cin >> n;
  string s;
  cin >> s;
  for (int i = 0; i < 8; i++) {
    if ((int)(s).size() == (int)(arr[i]).size()) {
      bool works = true;
      for (int j = 0; j < n; j++) {
        if (s[j] != '.' && s[j] != arr[i][j]) {
          works = false;
        }
      }
      if (works) {
        cout << (arr[i]) << '\n';
        return 0;
      }
    }
  }
}
