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