#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  cin >> n;
  string s[] = {"jolteon", "flareon", "espeon", "umbreon",
                "leafeon", "glaceon", "sylveon"};
  string a;
  cin >> a;
  if (n == 6)
    cout << "espeon";
  else if (n == 8)
    cout << "vaporeon";
  else {
    for (int i = 0; i < 7; i++) {
      int flag = 0;
      for (int j = 0; j < 7; j++) {
        if (s[i][j] == a[j] || a[j] == '.') flag++;
      }
      if (flag == 7) {
        cout << s[i];
        break;
      }
    }
  }
}
