MAYBE a b x b c x a c x c a x b b x a c x c b x b c x c b x c c x c c x c b x P x Q Q p x p p x q q x p Q Q x Q Q p x Q p q x q p Q x q q p x p q q x q Q x x Q q x x p P x x P p x x 2.1 ACP 0.72