#include <bits/stdc++.h>
using namespace std;
vector<string> save;
int main() {
  save.push_back("jolteon");
  save.push_back("vaporeon");
  save.push_back("flareon");
  save.push_back("espeon");
  save.push_back("umbreon");
  save.push_back("leafeon");
  save.push_back("glaceon");
  save.push_back("sylveon");
  string cad;
  int n;
  cin >> n;
  cin >> cad;
  for (int i = 0; i < save.size(); i++) {
    if (cad.size() == save[i].size()) {
      bool tmp = true;
      for (int j = 0; j < cad.size(); j++) {
        if (cad[j] == '.') continue;
        if (cad[j] != save[i][j]) tmp = false;
      }
      if (tmp) {
        cout << save[i] << endl;
        return 0;
      }
    }
  }
  return 0;
}
