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