Question: Let = {a, b, c}. Prove that B = { wcw R | w {a, b}*} (note w R is w reverse) is not regular.

Let = {a, b, c}. Prove that B = { wcw^R | w {a, b}*} (note w^R is w reverse) is not regular. Examples are: aca, bacab, abcba, aabbcbbaa, aababcbabaa.

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