Team A B C D E F G H I J K
One 5 6 5 6 5 7 9 5
Two 5 6 5 6 6 6
6
Three 7 7 7 7 7 7 7 7 7 7

Your question is" "How do I count the last six non black cells?"

I am not trying to be flippant or anything, but won't that number be 6
(possibly, per row)?

I think you might need to provide some more detail about what you are trying
to do.

Rick