#include <bits/stdc++.h>
using namespace std;
int main() {
  string all_names[8] = {"vaporeon", "jolteon", "flareon", "espeon",
                         "umbreon",  "leafeon", "glaceon", "sylveon"};
  int length;
  cin >> length;
  string name_part;
  cin >> name_part;
  int correct_index = 0;
  for (int i = 0; i < 8; i++) {
    bool is_correct = true;
    if (all_names[i].length() == length) {
      for (int j = 0; j < length; j++) {
        if (name_part[j] != '.') {
          if (name_part[j] != all_names[i][j]) {
            is_correct = false;
            break;
          }
        }
      }
      if (is_correct) {
        correct_index = i;
        cout << all_names[correct_index] << endl;
        return 0;
      }
    }
  }
  return 0;
}
