JP And Strings

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A 1-character string is which consists of only one letter 'a', 2-character string consists of only letters 'a' and 'b'. Similarly 26-character string consists of all the small letters in alphabet i.e from 'a' to 'z'. A string is valid if there is no character in the string which has the same position as in the alphabetical sequence. For example, string "bac" is not valid because the character 'c

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solution.cppC++17

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