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