How to sort a mask file based on probability

[firefullplank]

I have a mask file consisting of about 46k different masks to make it only try 8 character passwords that include at least 1 digit, 1 lowercase char and 1 uppercase char. The thing is that the masks are in a seemingly random order and I would like to sort it so it tries the most probable masks first because it's unlikely that someone has a password where format will be ?s?s?s?s?s?l?u?d. I could make a python script do this but I am unsure of the different probabilities of a password starting with a uppercase char and the next one being lowercase etc.
Is there any tool out there that will sort a mask file for you based on probability or if not any source that tells me the probabilities of these different cases so i can make a tool to sort my mask file.

Thanks.