#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  int i, j, k, f = 0, ans = 0, max = 0;
  cin >> n;
  string b;
  cin >> b;
  string a[8] = {"vaporeon", "jolteon", "flareon", "espeon",
                 "umbreon",  "leafeon", "glaceon", "sylveon"};
  if (b.size() == 6) {
    cout << "espeon";
    return 0;
  }
  for (i = 0; i < 8; i++) {
    f = 0;
    if (a[i].size() == b.size()) {
      for (k = 0, j = 0; j < b.size(); k++, j++) {
        if (a[i][k] == b[j]) f++;
      }
    }
    if (f > max) {
      max = f;
      ans = i;
    }
  }
  cout << a[ans];
  return 0;
}
