/usr/share/acl2-8.0dfsg/books/centaur/4v-sexpr/ is in acl2-books-source 8.0dfsg-1.
This file is owned by root:root, with mode 0o755.
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/usr/share/acl2-8.0dfsg/books/centaur/4v-sexpr/4v-logic.lisp
/usr/share/acl2-8.0dfsg/books/centaur/4v-sexpr/bitspecs.lisp
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