input: Write a function to check if two strings are palindromes of each other.
  assert palindrome_checker("level", "level") == True
  assert palindrome_checker("deified", "deified") == True
  assert palindrome_checker("hello", "olleh") == False
  assert palindrome_checker("Aba", "abA") == True
output: def palindrome_checker(str1, str2):
      return str1.lower() == str2[::-1].lower()