#include <bits/stdc++.h>
using namespace std;
const int N = 100005;
string s[] = {"vaporeon", "jolteon", "flareon", "espeon",
              "umbreon",  "leafeon", "glaceon", "sylveon"};
string a;
int main() {
  int i, j, n;
  bool flag;
  cin >> n;
  cin >> a;
  for (i = 0; i < 8; i++)
    if (s[i].size() == n) {
      flag = true;
      for (j = 0; j < n; j++)
        if (!(a[j] == '.' || a[j] == s[i][j])) flag = false;
      if (flag) {
        cout << s[i];
        return 0;
      }
    }
  return 0;
}
