Shikhar loves Strings

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Little Shikhar loves presents. His mum bought him two strings of the same size for his birthday. The strings consist of uppercase and lowercase Latin letters. Now Shikhar wants to compare those two strings lexicographically. The letter’s case does not matter, that is an uppercase letter is considered equivalent to the corresponding lowercase letter. Help Shikhar perform the comparison. ###Input

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solution.cppC++17

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