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