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