How to speed up password search?

[szosti94]

I'm trying to recover my ETH password. I know first 6 chars and the password is 12 chars long. For example, first chars are abcdef and the rest of password are just letters and numbers. So I'm typing command:

-m 15700 -a 3 -w 3 -1 ?l?u?d hash abcdef?1?1?1?1?1?1

and searching time is about 126 days (CPU). Can I somehow speed up searching, maybe there is other method relevant in this case?