Check if a String is a Palindrome

You are given a string s. Your task is to check whether the string is a palindrome, ignoring case, spaces, and punctuation.

A string is a palindrome if it reads the same backward as forward after removing all characters except letters and digits. Mathematically, if we let \(f(s)\) be the function that removes non-alphanumeric characters from \(s\) and converts it to lowercase, then a string is a palindrome if:

\[ f(s) = \text{reverse}(f(s)) \]

Your program should read the input from stdin and output the result to stdout as True if the string is a palindrome; otherwise, output False.

inputFormat

The input consists of a single string that may include spaces, punctuation, and various characters. The input is read from stdin.

outputFormat

Output a single line: True if the string is a palindrome, or False otherwise. The output is written to stdout.

A man, a plan, a canal, Panama!

True