42.4. Second assignment

42.4.1. str.upper(), str.lower(), str.title()

Fill ____ pieces below to have correct values for lower_cased, upper_cased and title_cased variables.

original_string = 'Ocademy is so COOL!'

# Your code here:

lower_cased = original_string.____
upper_cased = ____.upper()
title_cased = ____.____

# Let's verify that the implementation is correct by running the cell below
# `assert` will raise `AssertionError` if the statement is not true.
assert lower_cased == 'ocademy is so cool!'
assert upper_cased == 'OCADEMY IS SO COOL!'
assert title_cased == 'Ocademy Is So Cool!'