#include <bits/stdc++.h>
using namespace std;
int n;
string s[10] = {"vaporeon", "jolteon", "flareon", "espeon",
                "umbreon",  "leafeon", "glaceon", "sylveon"};
int main() {
  cin >> n;
  string s1;
  cin >> s1;
  for (int i = 0; i < 8; ++i) {
    bool check = 0;
    if (s[i].size() != s1.size()) continue;
    for (int j = 0; j < s1.size(); ++j) {
      if (s1[j] == '.') continue;
      if (s1[j] != s[i][j]) {
        check = 1;
        break;
      }
    }
    if (!check) {
      cout << s[i];
      return 0;
    }
  }
  return 0;
}
