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