Specific amount of letters/digits

[Onyx]

As asked and somewhat answered here; I'm looking to try and crack a hash I know to be 12 characters long, having 2 digits, and 10 letters, albeit in any position. The response linked seems like it'd work, however, doesn't when I attempt to parse the rejection rule, stating "No valid rules left" so I'm a little stumped. Is it just that the flow has changed since that post? Or is this typical noob user error?

Example of possible combinations, much like in the OP:
abc1defgh2ij
2zyxw1vutsrq
etc.

[Snoopy]

well i think the fastest way is to use a maskfile with all possible masks

starting with

Code:

?d?d?l?l?l?l?l?l?l?l?l?l

then shifting the second ?d until you reach the end so from 

Code:

?d?l?d?l?l?l?l?l?l?l?l?l
up to
?d?l?l?l?l?l?l?l?l?l?l?d

then start again with both ?d?d shifted once 

Code:

?l?d?d?l?l?l?l?l?l?l?l?l

and from there  again shift the second ?d until your reach the end

you should end up with 66 or 65 (11 +10 +9 ... + 1) masks, not quite sure about the last one, representing all possibilities

you can shuffle the resulting lines to achieve add some randomluck or just stay with this order

[nadir]

Hola, me podria ayudar?, requiero de un patron que yo mismo establezco para usar este comando ?d?d
?l?l?l?l?l?l?l?l?l?l?