I don't know what software to use

[BirdDad]

I am trying to crack Truecrypt containers not whole drives.
Preferably windows but I'll take what I can get.
For example the passwords are cascaded by Twofish/Serpent and a Whirlpool hash.
Example: don'tCumKnocking10105050HaGotYa%
where the unknown is two character injected between the 1010 and 5050
so if the unknown was L* would be: don'tCumKnocking1010L*5050HaGotYa%
Can someone please help me to do this?
Thank you.