#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  cin >> n;
  vector<string> s = {"vaporeon", "jolteon", "flareon", "espeon",
                      "umbreon",  "leafeon", "glaceon", "sylveon"};
  string t;
  cin >> t;
  for (string x : s) {
    if (t.size() != x.size()) continue;
    int can = 1;
    for (int i = 0; i < t.size(); i++) {
      can &= t[i] == '.' || t[i] == x[i];
    }
    if (can) cout << x << endl, exit(0);
  }
}
