CSS Writing Modes Test: vertical-rl - table rows progression and rowspan

A B C DDD	EE F G H	JJ K L M WW X Y Z
N O Q RRR	SS T U V	JJ K L M WW X Y Z
aaa b c ddd	ee f g hh r s t uu	jj kk
mmm n o qqq	ee f g hh r s t uu	vv