#include <bits/stdc++.h>
using namespace std;
int main() {
  string a, s[8] = {"vaporeon", "jolteon", "flareon", "espeon",
                    "umbreon",  "leafeon", "glaceon", "sylveon"};
  cin >> a >> a;
  for (int i = 0; i < 8; ++i) {
    if (a.length() != s[i].length()) continue;
    int j = 0;
    while (j < a.length() && (a[j] == '.' || a[j] == s[i][j])) ++j;
    if (j == a.length()) {
      cout << s[i] << endl;
      cin >> a;
      return 0;
    }
  }
  return 0;
}
