#include <bits/stdc++.h>
using namespace std;
bool comp(string s, string b) {
  int i;
  for (i = 0; i < s.size(); i++) {
    if (s[i] == '.')
      continue;
    else if (s[i] == b[i])
      continue;
    else
      return false;
  }
  return true;
}
int main() {
  int n;
  cin >> n;
  string s;
  cin >> s;
  map<int, vector<string> > m;
  m[8].push_back("vaporeon");
  m[7].push_back("jolteon");
  m[7].push_back("flareon");
  m[6].push_back("espeon");
  m[7].push_back("umbreon");
  m[7].push_back("leafeon");
  m[7].push_back("glaceon");
  m[7].push_back("sylveon");
  for (int i = 0; i < m[n].size(); i++) {
    if (comp(s, m[n][i])) {
      cout << m[n][i];
      return 0;
    }
  }
}
