#include <bits/stdc++.h>
using namespace std;
int main() {
  ios::sync_with_stdio(false);
  string s;
  int n;
  cin >> n >> s;
  if (n == 8) {
    cout << "vaporeon" << endl;
  } else if (s[0] == 'j' || s[1] == 'o' || s[3] == 't') {
    cout << "jolteon" << endl;
  } else if (n == 6) {
    cout << "espeon" << endl;
  } else if (s[0] == 'u' || s[1] == 'm' || s[2] == 'b') {
    cout << "umbreon" << endl;
  } else if (s[0] == 'l' || s[1] == 'e' || s[3] == 'f') {
    cout << "leafeon" << endl;
  } else if (s[0] == 's' || s[1] == 'y' || s[2] == 'l' || s[3] == 'v') {
    cout << "sylveon" << endl;
  } else if (s[0] == 'g' || s[3] == 'c') {
    cout << "glaceon" << endl;
  } else {
    cout << "flareon" << endl;
  }
  return 0;
}
