#include <bits/stdc++.h>
using namespace std;
string arr[] = {"vaporeon", "jolteon", "flareon", "espeon",
                "umbreon",  "leafeon", "glaceon", "sylveon"};
int main() {
  ios_base ::sync_with_stdio(0);
  cin.tie(0);
  int n;
  string pat;
  cin >> n;
  cin >> pat;
  for (int i = 0; i < 8; i++) {
    if (n == arr[i].size()) {
      bool ok = true;
      for (int j = 0; j < n; j++) {
        if (pat[j] == '.') continue;
        if (pat[j] != arr[i][j]) {
          ok = false;
          break;
        }
      }
      if (ok) {
        cout << arr[i];
        return 0;
      }
    }
  }
}
