#include <bits/stdc++.h>
using namespace std;
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  cout.tie(NULL);
  long long int i, j, p, q, cnt = 0, ans = 0;
  bool flag = false;
  long long int n;
  cin >> n;
  string s;
  cin >> s;
  string st[8];
  st[0] = "vaporeon";
  st[1] = "jolteon";
  st[2] = "flareon";
  st[3] = "espeon";
  st[4] = "umbreon";
  st[5] = "leafeon";
  st[6] = "glaceon";
  st[7] = "sylveon";
  for (j = 0; j < 8; j++) {
    if (st[j].size() != n) continue;
    for (i = 0; i < n; i++) {
      p = i;
      if (s[p] != st[j][p] && s[p] != '.') break;
      if (i == n - 1) {
        cout << st[j] << endl;
        flag = true;
        break;
      }
    }
    if (flag) break;
  }
  return 0;
}
