A phrase is a palindrome if, after converting all uppercase letters into lowercase letters and removing all non-alphanumeric characters, it reads the same forward and backward. Alphanumeric characters include letters and numbers.
Given a string `s`, return `true` if it is a palindrome, or `false` otherwise.
checklist Constraints
1 <= s.length <= 2 * 10^5 s consists only of printable ASCII characters.