#include <bits/stdc++.h>
using namespace std;
string nama[] = {"vaporeon", "jolteon", "flareon", "espeon",
                 "umbreon",  "leafeon", "glaceon", "sylveon"};
int N;
char sc[10];
int main() {
  scanf("%d", &N);
  scanf("%s", sc);
  string s = sc;
  for (int i = 0; i < 8; i++) {
    bool cocok = 0;
    if (nama[i].length() == s.length()) {
      cocok = 1;
      for (int j = 0; j < nama[i].length(); j++) {
        if ((s[j] != '.') && (s[j] != nama[i][j])) {
          cocok = 0;
          break;
        }
      }
    }
    if (cocok) {
      printf("%s\n", nama[i].c_str());
    }
  }
  return 0;
}
