#include <bits/stdc++.h>
using namespace std;
int n;
bool f[8];
string st;
string v[8] = {"vaporeon", "jolteon", "flareon", "espeon",
               "umbreon",  "leafeon", "glaceon", "sylveon"};
int main() {
  cin >> n >> st;
  if (n == 6) {
    cout << "espeon";
    return 0;
  }
  if (n == 8) {
    cout << "vaporeon";
    return 0;
  }
  for (int i = 0; i < n; ++i) {
    if (st[i] >= 'a' && st[i] <= 'z') {
      for (int j = 0; j < 8; ++j) {
        if (st[i] != v[j][i]) {
          f[j] = true;
        }
      }
    }
  }
  for (int i = 0; i < 8; ++i) {
    if (!f[i]) {
      cout << v[i];
    }
  }
}
