Classes:     A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Order	Description	Count	Sample Item
LA	apex slopes	8
LB	special slopes	5
LC	1 x n slopes	4
LD	2 x n slopes	6
LE	3 x n slopes	2
LF	4 x n slopes	3
LG	6 x n slopes	1