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