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