Think about the steps involved:
(range 0 10) - which is the same as
(range 10) by the way - produces a sequence of numbers; you want to convert each number in the sequence to a
string; then you want to convert that result sequence into a set.
Sounds like
map and
set.
Do you know how to convert a number to a string?
I'm not just giving you the answer because I think you would benefit from going through the steps and figuring it out - and this is a very simple problem so if you don't understand how to solve this, you will be lost when you encounter harder problems.
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