Usage sort: About sorting a sequence of numbered books while you are picking books out of the sequence when you need them and insert them in afterwards (moving

Usage sort: About sorting a sequence of numbered books while you are picking books out of the sequence when you need them and insert them in afterwards (moving the books in between). What is the best strategy for where to put the books back? for a discussion see: https://www.iwriteiam.nl/Dpuzzle.html#usagesort https://www.iwriteiam.nl/Dpuzzle.html#usagesort