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