input: Write a function to determine if two given strings are anagrams of each other. If they are anagrams, return True; otherwise, return False. If either string is empty, return False.
  def is_anagram(str1, str2):
      if len(str1) != len(str2):
          return False
  
      str1_counts = collections.Counter(str1)
      str2_counts = collections.Counter(str2)
      
      for char in str1_counts:
          if str1_counts[char] != str2_counts[char]:
              return False
      return True
  
  assert is_anagram("abcd", "cbda")==True
  assert is_anagram("hello", "world")==False
  assert is_anagram("race", "care")==True
  assert is_anagram("anagram", "nagaram")==True
  assert is_anagram("", "test")==False
output: def is_anagram(str1, str2):
      if len(str1) == 0 or len(str2) == 0:
          return False
      return sorted(str1) == sorted(str2)