#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  cin >> n;
  string a[]{"vaporeon", "jolteon", "flareon", "espeon",
             "umbreon",  "leafeon", "glaceon", "sylveon"};
  map<int, vector<string> > mp;
  for (int i = 0; i < 8; i++) mp[a[i].size()].push_back(a[i]);
  string s;
  cin >> s;
  for (auto t : mp[n]) {
    bool ok = true;
    for (int i = 0; i < t.size(); i++) {
      if (t[i] != s[i] && s[i] != '.') ok = false;
    }
    if (ok) {
      cout << t;
      return 0;
    }
  }
}
