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.