Need to count consecutive letters and then deduct lowecase

I have a fairly complicated formula that counts consecutive letters if they are consecutive 6 or greater.

The formula (array) is this:
=SUM(IF(FREQUENCY(IF(H12:AB12="U",COLUMN(H12:AB12)),IF(H12:AB12<>"U",COLUMN(H12:AB12)))>=6,FREQUENCY(IF(H12:AB12="U",COLUMN(H12:AB12)),IF(H12:AB12<>"U",COLUMN(H12:AB12)))))

The line would look like this:

U U U U U U U U U U U U and the return would be 12.

Now though I would need it to deduct a lowecase "u" if it appears.
So I still want it to count this as consectutive and give me 12, but in the next column I want to put a formula that deducts the lower case "u"s that appear in that string.

U U U U U u U U U u U U so the return would be 10.

That did not seem to deduct the lowercase, still gave me the same total.

Actually what that seems to be doing is only counting consecutive upper case greater than six.
I need it to count consecutive upper and lower that are greater than 6 in any combination. But then from those sets deduct the lower case.

This could be in two formulas if it needs to be. The first one being the formula above that I am already using and then a second column that takes those results and deducts the lower case.
Not sure what is best....