stuff = ['book', 89, 5.3, True, [1, 2, 3], (4, 3, 2), {'dic': 1}]
print('book' in stuff) # Output: True
print('books' in stuff) # Output: False
# Remember it is case-sensitive
print('Book' in stuff) # Output: False
print([1,2,3] in stuff) # Output: True
print([1,2,3] not in stuff) # Output: False