#include <bits/stdc++.h>
using namespace std;
const int INF = 1000000000;
int n;
string s, s1;
string m[8] = {"vaporeon", "jolteon", "flareon", "espeon",
               "umbreon",  "leafeon", "glaceon", "sylveon"};
void Run() {
  cin >> n;
  cin >> s;
  for (int i = 0; i <= 7; i++) {
    if (m[i].length() == n) {
      s1 = m[i];
      for (int k = 0; k <= n - 1; k++) {
        if (s[k] != '.' && s1[k] != s[k]) break;
        if (k == n - 1) cout << m[i] << endl;
      }
    }
  }
}
int main() {
  ios_base::sync_with_stdio(0);
  Run();
  return 0;
}
