Understanding hybrid_attack

[babele]

Hi All,
I've some troubles in understanding how the hybrid_attack works.

what I would like to achieve is to try the follow chars pattern prepended to each of the words from the dictionary

Code:

[a-z0-9]+(.|_)[a-z0-9]+DICT_WORD

I'd like to have the keyspace incremental so that it will start from 3 chars up to X chars:

Code:

a.aDICT_WORD
zzzzzzzz.zzzzzzzDICT_WORD

Any help is really appreciated