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