Question: Theorem ex 2 : In [ a ; b ; b ; a ] ( a

Theorem ex2:
In ["a"; "b"; "b"; "a"]("a">>"b"*>>"a").
Proof.
Admitted.
(**
Show that the following word is rejected by the given language.
*)
Theorem ex3:
~ In ["b"; "b"]("a">>"b"*>>"a").
Proof.
Admitted.

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