input: def is_palindrome(s: str) -> bool:
      """This Python program checks if a given string s is a palindrome.
      A palindrome is a string that reads the same forward and backward.
      >>> is_palindrome('racecar')
      True
      >>> is_palindrome('hello')
      False
      """
      return s == s[::-1]
output:     return s == s[::-1]