Regular Expression Help

[Drew Tomlinson]

I'm attempting to take an ldiff file and flip first/last name order.  
However I can not figure out how to match hyphenated last names.  In 
vim, my current search/replace string is:

%s/cn=\(\w\+\-*\) \(\w\+\),/cn=\2 \1,/gc

This will match:

cn=Smith Joe,

and replace it with:

cn=Joe Smith,

But it will not match:

cn=Smith-Brown Joe,

nor replace it with:

cn=Joe Smith-Brown,

I've tried various incantations of escaping and quantifying yet I can 
not figure out how to do what I want.

Please show me my error.

Thanks,

Drew

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