#include <bits/stdc++.h>
using namespace std;
const string t[] = {"vaporeon", "jolteon", "flareon", "espeon",
                    "umbreon",  "leafeon", "glaceon", "sylveon"};
int n;
string s;
int main() {
  cin >> n >> s;
  for (int i = 0; i < 8; i++) {
    if (t[i].length() != n) continue;
    bool flag = true;
    for (int j = 0; j < n; j++)
      if (s[j] != '.' && s[j] != t[i][j]) {
        flag = false;
        break;
      }
    if (flag) {
      cout << t[i] << endl;
      break;
    }
  }
  return 0;
}
