#include <bits/stdc++.h>
using namespace std;
string names[] = {"vaporeon", "jolteon", "flareon", "espeon",
                  "umbreon",  "leafeon", "glaceon", "sylveon"};
bool pos[8];
int main() {
  string s;
  int p;
  cin >> p;
  cin >> s;
  for (int i = 0; i < 8; ++i)
    if (names[i].size() != p) pos[i] = true;
  for (int i = 0; i < s.size(); ++i)
    for (int j = 0; j < 8; ++j)
      if (s[i] != '.')
        if (names[j][i] != s[i]) pos[j] = true;
  for (int i = 0; i < 8; ++i)
    if (!pos[i]) return cout << names[i], 0;
}
