input: Write a function to determine if two given strings are anagrams. If they are anagrams return True, otherwise return False. If either of the strings is empty then return False.
  assert is_anagram("abcd", "cbda") == True
  assert is_anagram("hello", "ollhe") == True
  assert is_anagram("hello", "world") == False
  assert is_anagram("abc", "abcc") == False
  assert is_anagram("", "abc") == False
  assert is_anagram("abc", "") == False
  assert is_anagram("", "") == False
output: def is_anagram(s1, s2):
      if s1 == "" or s2 == "":
          return False
      return sorted(s1) == sorted(s2)