#include <bits/stdc++.h>
using namespace std;
int main() {
  string s[20] = {"vaporeon", "jolteon", "flareon", "espeon",
                  "umbreon",  "leafeon", "glaceon", "sylveon"};
  int a[] = {8, 7, 7, 6, 7, 7, 7, 7, 7, 7};
  int i, j, k, l, n, m, c;
  string s1, s2, str;
  cin >> n >> str;
  for (i = 0; i < 8; i++) {
    s1.clear();
    s1 = s[i];
    if (a[i] == n) {
      for (j = 0; s1[j] != '\0'; j++) {
        if (str[j] != '.' && s1[j] == str[j]) {
        } else {
          if (str[j] != '.') {
            break;
          }
        }
      }
    }
    if (j == s1.size()) {
      cout << s1 << endl;
      break;
    }
  }
  return 0;
}
