Hi,
could johnny provide similar functionality to https://7thzero.com/blog/certificate-password-recovery-tool ? For testing, let's take any current passhphrase you have, discard first leading 8 chars and provide the remaining portion of the passphrase to johnny, and let it to guess what were those leading 8 chars. Could this be achieved?

Likewise, user may provide leading part of the passphrase, asking johnny to find the reminder.

In both cases user should provide two ranges with min and max lengths of the prefix/suffix substrings to be generated, as well as an alphabet for each.

The PRINCE approach in the very last "tab" of johnny interface seemed to maybe provide something like this, but except of placing the remainder of the passphrase into a "word list" file, I failed to get it running.