Question: { a , b } * * { a a } { a , b } * * { b b } { a ,

{a,b}**{aa}{a,b}**{bb}{a,b}** is the set of all strings that contain
substrings: aa a ad bb
{a,b}**{aa}{a,b}**{bb}{a,b}** is the set of all strings that contain substrings: aa

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