#command cdx paste $TMP/aaa $TMP/bbb -D numeric -r one.uno,two.dos -r three.tres,four.quatro -R
#infile aaa
CDX one two three
111 222 333
11a 22b 33c
#infile bbb
CDX one two three
444 555 666
44d 55e 66f
#stdout
CDX one two three uno dos tres
111 222 333 444 555 666
11a 22b 33c 44d 55e 66f