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theory of computation: formal languages and automata and grammars While passwords generally have few restrictions, they are normally not totally free. Suppose that in a

theory of computation: formal languages and automata and grammars

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While passwords generally have few restrictions, they are normally not totally free. Suppose that in a certain system, passwords can be of arbitrary length but must contain at least one letter, a-z, and one number 0-9. Construct a grammar that generates the set of such legal passwords

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