grep regular expression for this

grep should match a string like abc and should match whatever word
that follows it, and display
only these two matching words.

for example
-----------
abc
abc xyz
abcd
some text abc def

In the above file grep should match only lines 2 and 4 and give output

abc xyz
abc def

what can be the possible regular expressions

thanks
sinbad

sinbad wrote:
> grep should match a string like abc and should match whatever word
> that follows it, and display
> only these two matching words.
>
> for example
> -----------
> abc
> abc xyz
> abcd
> some text abc def
>
> In the above file grep should match only lines 2 and 4 and give output
>
> abc xyz
> abc def
>
> what can be the possible regular expressions

$ echo "abc
abc xyz
abcd
some text abc def" | egrep -o 'abc +[[:alpha:]]+'
abc xyz
abc def



John
--
Perl isn't a toolbox, but a small machine shop where you
can special-order certain sorts of tools at low cost and
in short order.                            -- Larry Wall

In article <ER0Ij.14196$_v3.11547@edtnps90>,
"John W. Krahn" <someone@example.com> wrote:

> sinbad wrote: 
>
> $ echo "abc
> abc xyz
> abcd
> some text abc def" | egrep -o 'abc +[[:alpha:]]+'
> abc xyz
> abc def

I believe -o is a GNU grep extension.

--
Barry Margolin, barmar@alum.mit.edu
Arlington, MA
*** PLEASE don't copy me on replies, I'll read them in the group ***