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Chef and palindromes

Everybody loves palindromes, but chef doesn't. He has a string S that consists of lowercase English letters ('a' - 'z'). Chef wants to find a substring T of S of the maximal length so that T isn't a palindrome. Input The input contains a single line, containing string S. String S consists of lower case English letters. Output In a single line print the length of T Constraints - 1 ≤ |S

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solution.cppC++17

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