#command cdx cgrep -p ,expr,three<two
#stdin
 CDX	one	two	three	four
aaa	2	3	bbb
ccc	3	2	ddd
eee	100	50	fff
ggg	1.2e5	2.3e4	hhh
iii	555	666	jjj
#stdout
 CDX	one	two	three	four
ccc	3	2	ddd
eee	100	50	fff
ggg	1.2e5	2.3e4	hhh