Problem Statement

Take a string and reverse it. For example, "asdf" becomes "fdsa".

Preserve Unicode combining characters. For example, "as⃝df̅" becomes "f̅ds⃝a", not "̅fd⃝sa".

Let's start with the solution:

  [ dup nest? if
      [ [] swap witheach
          [ nested
            swap join ] ] ]     is reverse      (       x --> x       )