How do I use more than 4 custom masks?

[Snoopy]

Thanks Snoopy I'll check it out

I've got a (probably typical problem) where a part of the password is known, but it is known to have substitutions and the whole length is up to 10. The fewer possibilities... the better

substitutions can also be done by rules (mostly in addition with a good wordlist), but in your case (it seems you have a real good clue about the passwordstyle) i think the way i mentioned will be the best approach