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