title: Transformation of nested lists into a list of sets in Clojure?
body: <p>Having a list of equally sized lists, e.g.:</p>
  
  <pre><code>(def d [["A" "B"] ["A" "C"] ["H" "M"]])
  </code></pre>
  
  <p>How can it be transformed into a list of sets, each set for the indexes above:</p>
  
  <pre><code>[#{"A" "H"} #{"B" "C" "M"}]
  </code></pre>