#include <bits/stdc++.h>
using namespace std;
int n, num1 = 0, num2 = 0;
string arr[8] = {"vaporeon", "jolteon", "flareon", "espeon",
                 "umbreon",  "leafeon", "glaceon", "sylveon"},
       s;
int main() {
  cin >> n >> s;
  for (int i = 0; i < n; ++i)
    if (s[i] == '.') ++num1;
  for (int i = 0; i < 8; ++i)
    if (n == arr[i].size()) {
      for (int j = 0; j < n; ++j)
        if (s[j] == arr[i][j]) ++num2;
      if (num1 + num2 == n) {
        cout << arr[i];
        return 0;
      }
      num2 = 0;
    }
  return 0;
}
