#include <bits/stdc++.h>
using namespace std;
int N;
string s;
string pokemon[] = {"vaporeon", "jolteon", "flareon", "espeon",
                    "umbreon",  "leafeon", "glaceon", "sylveon"};
vector<pair<int, char> > name;
bool flag;
int main() {
  cin >> N >> s;
  for (int i = 0; i < s.size(); i++)
    if (s[i] != '.') name.push_back(pair<int, char>(i, s[i]));
  for (int i = 0; i < 8; i++) {
    flag = true;
    for (int j = 0; j < name.size(); j++) {
      if (pokemon[i][name[j].first] != name[j].second) {
        flag = false;
        break;
      }
    }
    if (flag && pokemon[i].size() == s.size()) {
      cout << pokemon[i];
      break;
    }
  }
}
