#command cdx paste -e late $TMP/aaa $TMP/bbb -d zzz
#infile aaa
 CDX	one	two	three
111	222	333
11a	22b	33c
11x	22y	33z
#infile bbb
 CDX	four	five	six
444	555	666
44d	55e	66f
#stdout
 CDX	one	two	three	four	five	six
111	222	333	444	555	666
11a	22b	33c	44d	55e	66f
11x	22y	33z	zzz	zzz	zzz