#include <bits/stdc++.h>
using namespace std;
int main(void) {
  size_t i;
  int n;
  bool ok[8] = {0};
  string str, sample[8]{"vaporeon", "jolteon", "flareon", "espeon",
                        "umbreon",  "leafeon", "glaceon", "sylveon"};
  int sam[8]{8, 7, 7, 6, 7, 7, 7, 7};
  cin >> n >> str;
  for (i = 0; i != n; ++i)
    if (sam[i] != n) ok[i] = 1;
  for (i = 0; i != n; ++i) {
    if (str[i] == '.') continue;
    for (size_t j = 0; j != 8; ++j)
      if (str[i] != sample[j][i]) ok[j] = 1;
  }
  for (i = 0; i != n; ++i)
    if (ok[i] == 0) break;
  cout << sample[i];
  return 0;
}
