/usr/ is in libalgorithm-combinatorics-perl 0.27-2build4.
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/usr/lib/
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/perl5/
/usr/lib/x86_64-linux-gnu/perl5/5.26/
/usr/lib/x86_64-linux-gnu/perl5/5.26/Algorithm/
/usr/lib/x86_64-linux-gnu/perl5/5.26/Algorithm/Combinatorics.pm
/usr/lib/x86_64-linux-gnu/perl5/5.26/auto/
/usr/lib/x86_64-linux-gnu/perl5/5.26/auto/Algorithm/
/usr/lib/x86_64-linux-gnu/perl5/5.26/auto/Algorithm/Combinatorics/
/usr/lib/x86_64-linux-gnu/perl5/5.26/auto/Algorithm/Combinatorics/Combinatorics.so
/usr/share/
/usr/share/doc/
/usr/share/doc/libalgorithm-combinatorics-perl/
/usr/share/doc/libalgorithm-combinatorics-perl/changelog.Debian.gz
/usr/share/doc/libalgorithm-combinatorics-perl/copyright
/usr/share/doc/libalgorithm-combinatorics-perl/examples/
/usr/share/doc/libalgorithm-combinatorics-perl/examples/combinations.pl
/usr/share/doc/libalgorithm-combinatorics-perl/examples/derangements.pl
/usr/share/doc/libalgorithm-combinatorics-perl/examples/permutations.pl
/usr/share/doc/libalgorithm-combinatorics-perl/examples/subsets.pl
/usr/share/man/
/usr/share/man/man3/
/usr/share/man/man3/Algorithm::Combinatorics.3pm.gz