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I've written some code that generates lists of given length and consisting of 2 types of elements. The result is a list that consists of lists representing the chains of elements. When n=1,the result is ((a) (b)),when n=2 the result is ((a a)(b a)(a b)(b b)).Here is my code: (defun ota(c d)(if (null...

Hello.How can I generate all possible lists of length n,consisting of elements "a" and "b".For example,if n=5 there must be 32 lists of length 5,consisting of "a" and "b".