I downloaded the "brewpal" app for brewing on my iphone and they don't seem to have a single continental malt in the grain selection so I was trying to add a german 2-row to the list for my wit and there is some field that is requiring a number to be assigned and it's called "P" the range is from 0-50P then the next field is degrees L. I get the lovibond rating field but what the heck does "P" stand for?