#include <bits/stdc++.h>
using namespace std;
struct Names {
  string name;
  bool flag;
};
int main() {
  int n;
  cin >> n;
  Names list[] = {"espeon",  1, "jolteon", 1, "flareon", 1, "umbreon",  1,
                  "leafeon", 1, "glaceon", 1, "sylveon", 1, "vaporeon", 1};
  string input;
  cin >> input;
  unsigned int length = input.length();
  if (length == 8) {
    cout << list[7].name << endl;
    return 0;
  } else if (length == 7) {
    for (int i = 0; i < (length); i++) {
      if (input[i] != '.') {
        for (int j = 1; j < 7; j++) {
          if ((input[i] != list[j].name[i] &&
               input[i] + 32 != list[j].name[i]) &&
              list[j].flag != 0) {
            list[j].flag = 0;
          }
        }
      }
    }
    for (int j = 1; j < 7; j++) {
      if (list[j].flag == 1) {
        cout << list[j].name << endl;
        return 0;
      }
    }
  } else if (length == 6) {
    cout << list[0].name << endl;
    return 0;
  }
  return 0;
}
