- #- letters in a but not in b
- #| letters in either a or b
- #& letters in both a and b
- #^ letters in a or b but not both
- basket = ['apple', 'orange', 'apple', 'pear', 'orange', 'banana']
- fruit = set(basket)
- a = set('abracadabra')
- b = set('alacazam')
- print a
- print a - b
- print a | b
- print a $ b
- print a ^ b
