#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  string s;
  cin >> n >> s;
  vector<string> v(7);
  v[0] = "jolteon";
  v[1] = "flareon";
  v[2] = "espeon";
  v[3] = "umbreon";
  v[4] = "leafeon";
  v[5] = "glaceon";
  v[6] = "sylveon";
  sort(v.begin(), v.end());
  if (n == 8)
    cout << "vaporeon";
  else {
    int c = 0;
    for (int i = 0; i < s.size(); i++) {
      if (s[i] != '.') c++;
    }
    for (int i = 0; i < 7; i++) {
      int cc = 0;
      for (int j = 0; j < s.size(); j++) {
        if (v[i][j] == s[j]) {
          cc++;
        }
        if (c == cc) {
          cout << v[i];
          return 0;
        }
      }
    }
  }
}
