input: Write a python function to check if two strings are anagrams of each other.
  assert isAnagram('banana', 'abanan') == True
  assert isAnagram('listen', 'silent') == True
  assert isAnagram('hello', 'world') == False
  assert isAnagram('evil', 'vile') == True
  assert isAnagram('racecar', 'carrace') == True
output: def isAnagram(str1, str2):
      return sorted(str1) == sorted(str2)