Mask-Problem for Noob.

Hi guys,

who can help me? I have an understanding problem. I know that a user creates his passwords by following schemes:


1-4 numbers (but not always)
1-12 letters (from time to time is the first letter a uppercase).
1-4 numbers (but not always)
1-2 special character (but not always)

There is a muster:

68alex!
5alehandro!!
37Aleks!!!
Alekss75!
alehhandro68!
1968aleksander1975
aleksander75.
Aleksandr1975
Aleksander1975!
alex1968.

Which mask can I create, to cover all there possible combinations of such passwords?

???

Although I have read the help, but my English is very bad.

Thanks.

Takeshi