From an example in the documentation:
$ bx seed | bx mnemonic-new | bx mnemonic-to-seed | bx hd-new
grab special regret prepare urge evidence slush lobster midnight odor wish ketchup
In Mastering Bitcoin, the example given here shows it going back to the seed that was originally created; this was done using an older version of bx though. Can someone explain how the seeds from line 1 and line 3 in the example are encoded/related?