Rules possible?

Hi!

I have a RAR5 hash that i want to decryt or almost I try, I Know that is a lower case 8 - 9 length and it is a word in spanish without rare charset. 

I want avoid the previous letter is equal to the next to avoid aaaaaaaaa and start with something like abcdefghi

I not really sure how to achive this rule with the info present in the wiki.

Thanks.