Actually I'm thinkin the "19th", was taken from yet another spew of A.I. algorithmic "logic", that you put up Chen... and the A.I. stuff has "yet" to have been correct... once again, XL175 is pulling the chain of those not paying attention for his own reasons... it even posted the old mathematical equation that good ol' XL put up originally from "several" years ago... best of luck to all of us