Add most of lab 6 content

journal/_src/posts/2022-09-28-lab-six.md

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 In this lab I learned about using hash sets and json parsing in racket.
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+## Hash Sets
+I learned about how to create, access and how to perform operations around hash sets, such as retrieving a color when accessing the hash set with the key of a fruit. You can use them to keep track of counts of a given string, such as in the test module in the lab.
+
+## JSON Parsing
+
+To be filled