#include <bits/stdc++.h>
using namespace std;
int main() {
  int n, i, j;
  string s, a[] = {"vaporeon", "jolteon", "flareon", "espeon",
                   "umbreon",  "leafeon", "glaceon", "sylveon"};
  cin >> n >> s;
  for (i = 0; i < 8; i++) {
    if (a[i].size() != n) continue;
    bool c = 1;
    for (j = 0; j < n; j++) {
      if (s[j] == '.') continue;
      if (s[j] != a[i][j]) c = 0;
    }
    if (c) {
      cout << a[i] << "\n";
    }
  }
  return 0;
}
