#include <bits/stdc++.h>
using namespace std;
int main() {
  vector<string> s;
  s.push_back("vaporeon");
  s.push_back("espeon");
  s.push_back("jolteon");
  s.push_back("umbreon");
  s.push_back("leafeon");
  s.push_back("glaceon");
  s.push_back("flareon");
  s.push_back("sylveon");
  int t, flag = 0;
  string p;
  int i;
  cin >> t >> p;
  for (i = 0; i < 8; i++) {
    flag = 0;
    if (p.size() != s[i].size())
      continue;
    else {
      for (int j = 0; j < t; j++) {
        if (p[j] != '.' && s[i][j] != p[j]) {
          flag++;
          break;
        }
      }
      if (flag == 0) {
        cout << s[i];
        return 0;
      }
    }
  }
}
