Inserted key: '123'.
Inserted key: '1231'.
Inserted key: '1232'.
Inserted key: '1233'.
Inserted key: '1234'.
Inserted key: '1235'.
Finding subtrie for prefix '123' ... (found)
Trie's prefix: '123'.
Finding symbol '3' ... found.
Current exist? yes.
Current symbol '3'.
Current trie's prefix '1233'.
Finding symbol '6' ... not found.
Current exist? no.