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