#include <bits/stdc++.h>
const int mod = 1e9 + 7;
using namespace std;
string b[6] = {"jolteon", "flareon", "leafeon",
               "umbreon", "glaceon", "sylveon"};
int main() {
  string s;
  int n;
  cin >> n >> s;
  if (n == 6)
    cout << "espeon";
  else if (n == 8)
    cout << "vaporeon";
  else {
    for (int i = 0; i < 6; i++) {
      bool w = 0;
      for (int j = 0; j < 7; j++) {
        if (s[j] != b[i][j] && s[j] != '.') {
          w = 1;
          break;
        }
      }
      if (!w) return cout << b[i], 0;
    }
  }
}
