input: Write a function to determine if two given strings are anagrams of each other. Return True if they are anagrams, otherwise return False.
  assert is_anagram("abcd", "cbda")==True
  assert is_anagram("hello", "world")==False
  assert is_anagram("race", "care")==True
  assert is_anagram("listen", "silent")==True
  assert is_anagram("python", "typhon")==True
output: def is_anagram(str1, str2):
      return sorted(str1) == sorted(str2)