Clean Phrase Palindrome

You can check a palindrome even inside a regular phrase with spaces, punctuation, and mixed letter case. Given a string s, consider only letters and digits, and ignore uppercase versus lowercase. Return True if the cleaned string reads the same forward and backward.

Примеры

Ввод
"A man a plan a canal Panama"
Вывод
True
Ввод
"race a car"
Вывод
False
Ввод
""
Вывод
True

Нужно реализовать

def is_palindrome(s):

Теги

stringstwo-pointers
PostgreSQLv16

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