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Exclude a word regex

Posted By:      Posted Date: August 28, 2010    Points: 0   Category :.NET Framework
Currently i am using one regex for accepting some records from a file.  That regex is ^[a-zA-Z0-9| ].*$. This regex accepts record starting with alphanumerics or blank space.I want to modify this regex such that, previous conditions should be there and regex should not accept record starting with word 'bbb'. Which regex should be used?

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