Regular Expression, detecting certain words

Hi,

I've got a regular expression that checks if sentences such as "A duck is a bird" or "A kitten is a cat" are valid:

^(A)\s\w+\s(is)\s(a)\s\w+$

I'm using vb.net and I want to tell which words are different, i.e I want to pickup from the first sentence "duck" and "bird" and "kitten" and "cat" from the second one.  How can I do this?

Cheers,
Col.
whos_wee_dugAsked:
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ozoCommented:
^A\s\(w+)\sis\sa\s(\w+)$
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whos_wee_dugAuthor Commented:
Also, I tried this but it didn't quite work:

        Dim test As String = "A duck is a bird"
        Dim re As New Regex("^(A)\s\w+\s(is)\s(a)\s\w+$")
        test = re.Replace(test, "$1 $2 $3 $4 $5")
        Response.Write("<br/>'" + test + "'")
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ozoCommented:
Dim re As New Regex("^(A)\s(\w+)\s(is)\s(a)\s(\w+)$")
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whos_wee_dugAuthor Commented:
thanks once again ozo, you've been a great help.

Cheers,
Col.
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