#include <bits/stdc++.h>
using namespace std;
int main() {
  vector<string> variants = {"vaporeon", "jolteon", "flareon", "espeon",
                             "umbreon",  "leafeon", "glaceon", "sylveon"};
  int n;
  string t;
  cin >> n >> t;
  for (int i = 0; i < variants.size(); i++) {
    if (variants[i].length() != n) continue;
    bool good = true;
    for (int j = 0; j < t.length(); j++)
      if (variants[i][j] != t[j] && t[j] != '.') {
        good = false;
        break;
      }
    if (good) cout << variants[i] << "\n";
  };
}
