Need help with mask and/or rule - 7 characters, must have a letter and number

[Pusher]

I am using mode 3200 for bcrypt.

Passwords requirements:
- 7 characters long
- Must have letters (upper and/or lower) and numbers.



The closest I've been able to come up with is using a mask:

Code:

hashcat -a 3 -m 3200 -1 ?l?u?d hashes.txt ?1?1?1?1?1?1?1

The problem is that this will generate a lot of passwords that only have numbers or only have letters.  All passwords must have both, and bcrypt is slow.