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