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:

1> lists:reverse("reverse!").
"!esrever"


reverse(Bin) ->
    Size = size(Bin)*8,
    <<T:Size/integer-little>> = Bin,
    <<T:Size/integer-big>>.