#include <bits/stdc++.h>
using namespace std;
string s[] = {"vaporeon", "jolteon", "flareon", "espeon",
              "umbreon",  "leafeon", "glaceon", "sylveon"};
int main() {
  ios_base::sync_with_stdio(false);
  int n;
  string str;
  bool chk[8];
  for (int i = 0; i < 8; ++i) chk[i] = true;
  cin >> n;
  cin >> str;
  if (n == 8) {
    cout << s[0] << endl;
    return 0;
  } else if (n == 6) {
    cout << s[3] << endl;
    return 0;
  }
  for (int i = 0; i < n; ++i) {
    if (str[i] == '.') continue;
    for (int j = 0; j < 8; ++j)
      if (chk[j] && str[i] != s[j][i]) chk[j] = false;
  }
  for (int i = 1; i < 8; ++i)
    if (chk[i]) cout << s[i] << endl;
  return 0;
}
