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Determine a regular expression for the language L over the alphabet { a , b } that ends with a letter that is different from
Determine a regular expression for the language L over the alphabet a b that ends with a letter that is different from the letter that it starts with. For example, ab ababab and aaaaabaaaabbbbbb are words in L but aaa, baabbaab, aaaaabaaaaaa and abaa are not.
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