Regex Question

[Telly Williams <TWilliams001@elp.rr.com>]

Hi,

	I'm reading up on Regular Expressions and I have a question about alternation.

	I have the sentences: "There was a dog in the house." & "A house on the hill."

	Both of these are in a file (named "regex") on two different lines.

	My understanding of alternation is that it will look both for what is on the right and left of the pipe.

	So, if I type: 

		grep in|hill regex

	isn't that supposed to give me both sentences in stdout?

	When I type that, I get nothing at all on return.  I've even typed it as:

		grep in\|hill regex

	and I still get nothing.  What am I doing wrong?  Is what I'm typing and what I'm asking for two different things?  Thanks.

TW