Question: please help with C++ Question Note If there are multiple sub-strings of equal length, choose the lexicographically smallest one If there are multiple sub-strings of

please help with C++
Question Note If there are multiple sub-strings of equal length, choose the lexicographically smallest one If there are multiple sub-strings of different length, choose the one with maximum length. If there is no sub-string that is the same when read forwards and backwards print "None". Sub-string is only valid if its Vength is more than 1. Strings only contain uppercase characters (AZ)
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