#include <bits/stdc++.h>
using namespace std;
const int MAXN = 2147483647;
int main() {
  string a[8] = {"vaporeon", "jolteon", "flareon", "espeon",
                 "umbreon",  "leafeon", "glaceon", "sylveon"};
  int n;
  cin >> n;
  cin.ignore();
  string ans;
  getline(cin, ans);
  for (int j = 0; j < 8; j++) {
    if (a[j].size() != n) continue;
    for (int i = 0; i < n; i++) {
      if (a[j][i] != ans[i] && ans[i] != '.') {
        break;
      }
      if (i == n - 1) {
        cout << a[j] << endl;
      }
    }
  }
  return 0;
}
