Python help

def palindrome_word:

'''

(str) -> bool The parameter is a string consisting only of lowercase alphabetic letters. It may or may not be a palindrome. Return True

if and only if the parameter is a palindrome. The empty string is considered to be a palindrome.

'''

def palindrom_phrase:

'''

(str) -> bool The parameter is a string that may or may not be a palindrome. Return True if and only if the parameter is a palindrome, independent of letter case and ignoring

non-alphabetic characters. To be clear, non-alphabetic characters should be ignored (that is, treated as if they are not present), and uppercase letters should be considered to be

equal to their lowercase equivalents.

Ex. "Madam I'm Adam" is a palindrome.

'''