#include <bits/stdc++.h>
using namespace std;
vector<string> names = {"vaporeon", "jolteon", "flareon", "espeon",
                        "umbreon",  "leafeon", "glaceon", "sylveon"};
string input;
int main() {
  int d;
  cin >> d;
  cin >> input;
  for (int i = 0; i < names.size(); i++) {
    bool found = true;
    if (input.length() != names[i].length()) continue;
    for (int j = 0; j < input.length(); j++) {
      if (input[j] != '.' && input[j] != names[i][j]) {
        found = false;
        break;
      }
    }
    if (found) {
      cout << names[i] << endl;
      return 0;
    }
  }
  return 0;
}
