#include <bits/stdc++.h>
using namespace std;
string ev[] = {"vaporeon", "jolteon", "flareon", "espeon",
               "umbreon",  "leafeon", "glaceon", "sylveon"};
int main() {
  int n;
  string s;
  cin >> n;
  cin >> s;
  for (int i = 0; i < 8; i++) {
    if (ev[i].size() == s.size()) {
      bool ok = 1;
      for (int j = 0; j < s.size(); j++) {
        if (s[j] == '.') continue;
        if (s[j] != ev[i][j]) {
          ok = 0;
          break;
        }
      }
      if (ok) {
        cout << ev[i] << endl;
        return 0;
      }
    }
  }
  return 0;
}
