#command cdx sort -k ,expr.rev,two+three
#stdin
 CDX	one	two	three	four
aaa	1	2	bbb
bbb	2	3	ccc
ddd	-2	3	eee
#stdout
 CDX	one	two	three	four
bbb	2	3	ccc
aaa	1	2	bbb
ddd	-2	3	eee