[Haskell-beginners] Print Unicode in String

[dan portin]

Hi,

Perhaps I'm missing something, but I haven't found an answer to this
question in the textbook I have been using (Thompson) or through
Google/Hoogle: can a String include Unicode characters? For instance, if I
am defining an instance of Show Expr, where Expr models simple arithmetic
expressions (or Show Seq, where Seq models a sequent calculus, and so
forth), could I define a function *show Pi* = U+03C0 or *show Delta* =
U+0395? Perhaps the answer is obvious, but I haven't been able to find it.
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