Example: tourism industry

Regular Expressions and their Languages

Describe the language of the RE, L+b+bb+bbbb*. bbbb* represents the strings of 3 or more b’s. The rest of the expression takes care of lengths 0, 1 and 2, giving the set of all strings of b’s. Thus the given regular expression simplifies to b*. A description of the language is “the set of all strings of zero or more b’s.”

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  Bbbb

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