Swap two names
first refers to "apple" and second refers to "bread". Make them swap,
so that first refers to "bread" and second to "apple", then print both
on one line, first then second.
bread apple
Do this using only the names, without writing "bread" or "apple" again;
moving values between names is the skill being practised.
first = "apple"
second = "bread"
# swap them
print(first, second)