#include <bits/stdc++.h>
using namespace std;
string names[8] = {"vaporeon", "jolteon", "flareon", "espeon",
                   "umbreon",  "leafeon", "glaceon", "sylveon"};
int n, ans;
string name;
int main() {
  while (scanf("%d", &n) > 0) {
    cin >> name;
    if (n == 6)
      cout << names[3];
    else if (n == 8)
      cout << names[0];
    else if (name[0] == 'j' || name[1] == 'o' || name[3] == 't')
      cout << names[1];
    else if (name[0] == 'f' ||
             (name[3] == 'r' && (name[1] == 'l' || name[2] == 'a')))
      cout << names[2];
    else if (name[0] == 'u' || name[1] == 'm' || name[2] == 'b' ||
             name[3] == 'r')
      cout << names[4];
    else if (name[0] == 'l' || name[1] == 'e' || name[3] == 'f')
      cout << names[5];
    else if (name[0] == 'g' || name[1] == 'l' || name[2] == 'a' ||
             name[3] == 'c')
      cout << names[6];
    else if (name[0] == 's' || name[1] == 'y' || name[2] == 'l' ||
             name[3] == 'v')
      cout << names[7];
    puts("");
  }
  return 0;
}
