'''

Write a function that takes in a non-empty string and that returns a boolean

representing whether the string is a palindrome.

Sample Input: abba

Output: True

Sample Input: aberba

Output: False

Explanation:

In this implementation, we use Python's filter() function to remove all non-alphanumeric characters

from the string and lower() method to convert the string to lowercase. Then we check if the reversed

string is equal to the original string using the slice notation [::-1]. If the two strings are equal,

we return True, indicating that the input string is a palindrome; otherwise, we return False.

'''

def is_palindrome(s: str) -> bool:

"""

This function takes in a non-empty string and returns a boolean indicating

whether the string is a palindrome or not.

Parameters:

s (str): The input string

Returns:

bool: True if s is a palindrome, False otherwise

"""

# Remove all non-alphanumeric characters and convert to lowercase

s = ''.join(filter(str.isalnum, s)).lower()

# Check if the reversed string is equal to the original string

return s == s[::-1]