Valid Palindrome Checker

Given a string s, determine whether it is a palindrome. In this problem, you need to ignore case and all non-alphabetical characters. In other words, first filter out everything except letters, convert them to lowercase, and then check whether the resulting string is equal to its reverse.

A string s is said to be a palindrome if it satisfies \[ s = s^R \] where \(s^R\) denotes the reverse of \(s\).

For example, the string "A man, a plan, a canal, Panama" is a palindrome, whereas "hello" is not.

inputFormat

The input consists of a single string s provided via standard input. The string may contain spaces, punctuation, or other non-alphabetical characters. Handle the input as a whole line.

outputFormat

Output a single line: True if the processed string is a palindrome, and False otherwise.

A man, a plan, a canal, Panama

True