lost private key password

[Realos]

hello,

I have found an old pair of private and public keys but unfortunaltely
do no remember the corresponding password. Public key is places on key
servers, thus I would like to have access to it's password again.

What would you suggest in this case? A brute force attack with some
software if I know part of the password? What tool is suitable for that?

Thanks in anticipation.

Regards,


-- 
Realos