how to limit a character in the mask

[papopig81]

Hello, I should find a password with length 8. Formed by numbers and capital letters.
To speed up the process, I don't want more than 6 numbers and 6 letters to appear in the same password.
how should i set the mask?
thanks to those who can help me

[atom]

You need to generate a maskfile using PACK (you can find it on github).