I need a RECURSIVE definition of the described palindrome in

I need a RECURSIVE definition of the described palindrome in the link below. I tried to turn in the answer provided, but it was not accepted.

https://www.chegg.com/homework-help/questions-and-answers/consider-palindromes-consist-lowercase-letters-level-deed-radar-ada-101-let-c-n-number-pal-q15799047

Solution

A palindrome is a word that is spelled the same forward and backward. For example, as you stated \"level\" and \"deed\" are palindromes. but \"computer\" is not a palindrome. Now consider the word \'a\' it is palindrome, In fact we don\'t have the algorithm that this chapter gave for recognizing palindromes can be adaptedeasily to this language. The algorithm, which is recursive and processes the string strfrom both ends toward the middle, is based on the following facts:

A string with no characters is not in the language.nA string with exactly one character is in the language if the character is a $.nA longer string is in the language if the ends are identical letters and the innersubstring (from the second character to the next-to-last character ofstr) is in thelanguage.

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