#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  string ev;
  cin >> n >> ev;
  if (ev.size() == 6)
    cout << "espeon";
  else if (ev.size() == 8)
    cout << "vaporeon";
  else {
    if (ev[0] == 'j' || ev[1] == 'o' || ev[3] == 't')
      cout << "jolteon";
    else if (ev[0] == 'g' || ev[3] == 'c')
      cout << "glaceon";
    else if (ev[0] == 'u' || ev[1] == 'm' || ev[2] == 'b')
      cout << "umbreon";
    else if (ev[0] == 's' || ev[1] == 'y' || ev[3] == 'v')
      cout << "sylveon";
    else if (ev[0] == 'l' || ev[1] == 'e' || ev[3] == 'f')
      cout << "leafeon";
    else
      cout << "flareon";
  }
  return 0;
}
