#include <bits/stdc++.h>
using namespace std;
string a[8] = {"vaporeon", "jolteon", "flareon", "espeon",
               "umbreon",  "leafeon", "glaceon", "sylveon"};
int main(void) {
  ios::sync_with_stdio(false);
  int l;
  cin >> l;
  string x;
  cin >> x;
  for (int i = 0; i < 8; i++) {
    if (a[i].size() != x.size()) continue;
    bool ok = 1;
    for (int j = 0; j < x.size(); j++)
      if (a[i][j] != x[j] && x[j] != '.') ok = 0;
    if (ok) {
      cout << a[i] << endl;
      return 0;
    }
  }
  return 0;
}
