Apalindrome is a word, phrase, number, or other sequence of characters which reads the same backward as forward, such as madam or racecar. sentence-length palindromes may be written when allowances are made for adjustments to capital letters, punctuation, and word dividers, such as "a man, a plan, a canal, panama! ", "was it a car or a cat i saw? " or "no 'x' in nixon". write a function that takes a string as an argument and returns true if the string is a palindrome and false otherwise.