#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  cin >> n;
  string s[] = {"jolteon", "flareon", "umbreon",
                "leafeon", "glaceon", "sylveon"};
  string s1;
  cin >> s1;
  int c = 0, ct = 0, i, j;
  for (i = 0; i < n; i++) {
    if (s1[i] != '.') {
      ct++;
    }
  }
  if (n == 6) {
    cout << "espeon" << endl;
  } else if (n == 8) {
    cout << "vaporeon" << endl;
  } else {
    for (i = 0; i < n; i++) {
      c = 0;
      for (j = 0; j < 7; j++) {
        if (s1[j] == s[i][j]) {
          c++;
        }
      }
      if (c == ct) {
        cout << s[i] << endl;
        break;
      }
    }
  }
  return 0;
}
