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