Palindromes
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Shashank is the head of the Environment Sustainability Management Committee. He wants to give a token of appreciation to Prachi for his contributions to their purpose. For this purpose, he has bought N pairs of letters where each letter is either 'a' or 'b'. Thus, the possible pairs are 'aa', 'ab', 'ba', 'bb'. Now Prachi is very fond of palindromes, so Shashank decided to concatenate some(or none
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solution.cppC++17
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