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
RA	borders	5
RB	2 x 2 angles	3
RC	right angles	4
RD	sloped brackets	2
RE	other brackets	4
RF	balls and sockets	6
RG	two tab tenons	6
RH	three tab tenons	5
RI	stackable bars	4
RJ	other bars	5