#include <bits/stdc++.h>
using namespace std;
int main() {
  int n, m = 0, i, j;
  cin >> n;
  string s1, s2[6] = {"jolteon", "flareon", "umbreon",
                      "leafeon", "glaceon", "sylveon"};
  cin >> s1;
  if (n == 8)
    cout << "vaporeon"
         << "\n";
  else if (n == 6)
    cout << "espeon"
         << "\n";
  else {
    for (i = 0; i < 6; i++) {
      for (j = 0; j < n; j++) {
        if ((s1[j] == '.') && (j != n - 1))
          continue;
        else if (s1[j] >= 97 && s1[j] <= 122 && j != n - 1) {
          if (s1[j] != s2[i][j]) break;
        } else if (j == n - 1) {
          cout << s2[i] << "\n";
          m = 1;
          break;
        }
        if (m == 1) break;
      }
    }
  }
}
