input: Write a python function to check if two strings are anagrams of each other.
  assert isAnagram('listen', 'silent') == True
  assert isAnagram('hello', 'billion') == False
  assert isAnagram('Debit Card', 'Bad Credit') == True
  assert isAnagram('Astronomer', 'Moon starer') == True
  assert isAnagram('School master', 'The classroom') == True
output: def isAnagram(str1, str2):
      str1 = ''.join(str1.split()).lower()
      str2 = ''.join(str2.split()).lower()
      return sorted(str1) == sorted(str2)