#command cdx cgrep -p 2,,foo $TMP/one $TMP/two
#infile one
aaa	bbb	ccc
111	2foo2	333
qqq	www	eee
#infile two
zzz	zfooz	zzz
aaa	bbb	ccc
qqq	www	eee
yyy	foo	yyy
#stdout
111	2foo2	333
zzz	zfooz	zzz
yyy	foo	yyy