/usr/ is in libregexp-grammars-perl 1.045-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/doc/
/usr/share/doc/libregexp-grammars-perl/
/usr/share/
/usr/share/man/
/usr/share/man/man3/
/usr/share/man/man3/Regexp::Grammars.3pm.gz
/usr/share/perl5/
/usr/share/perl5/Regexp/
/usr/share/perl5/Regexp/Grammars.pm
/usr/share/doc/libregexp-grammars-perl/copyright
/usr/share/doc/libregexp-grammars-perl/changelog.Debian.gz
/usr/share/doc/libregexp-grammars-perl/examples/
/usr/share/doc/libregexp-grammars-perl/examples/demo_flattening.pl
/usr/share/doc/libregexp-grammars-perl/examples/demo_Lucene_query.pl
/usr/share/doc/libregexp-grammars-perl/examples/demo_rfc5322.pl
/usr/share/doc/libregexp-grammars-perl/examples/demo_list.pl
/usr/share/doc/libregexp-grammars-perl/examples/demo_calc_list_inline.pl
/usr/share/doc/libregexp-grammars-perl/examples/demo_hash_lookup_generated.pl
/usr/share/doc/libregexp-grammars-perl/examples/demo_whoson.pl
/usr/share/doc/libregexp-grammars-perl/examples/demo_hash_lookup_hardcoded.pl
/usr/share/doc/libregexp-grammars-perl/examples/demo_LaTeXish_dump.pl
/usr/share/doc/libregexp-grammars-perl/examples/demo_calc_class.pl
/usr/share/doc/libregexp-grammars-perl/examples/demo_calc_inline.pl
/usr/share/doc/libregexp-grammars-perl/examples/demo_LaTeXish.pl
/usr/share/doc/libregexp-grammars-perl/examples/demo_hash_lookup_hashrule.pl
/usr/share/doc/libregexp-grammars-perl/examples/demo_pos.pl
/usr/share/doc/libregexp-grammars-perl/examples/demo_hash_symtab.pl
/usr/share/doc/libregexp-grammars-perl/examples/demo_hashlines.pl
/usr/share/doc/libregexp-grammars-perl/examples/demo_debug.pl
/usr/share/doc/libregexp-grammars-perl/examples/demo_require.pl
/usr/share/doc/libregexp-grammars-perl/examples/demo_hash.pl
/usr/share/doc/libregexp-grammars-perl/examples/demo_IP4.pl
/usr/share/doc/libregexp-grammars-perl/examples/demo_hash_lexicon.pl.gz
/usr/share/doc/libregexp-grammars-perl/examples/demo_error.pl
/usr/share/doc/libregexp-grammars-perl/examples/demo_metagrammar.pl
/usr/share/doc/libregexp-grammars-perl/examples/demo_error_non_backtracking.pl
/usr/share/doc/libregexp-grammars-perl/examples/demo_calc_list_autoactions.pl
/usr/share/doc/libregexp-grammars-perl/examples/demo_calc_list.pl
/usr/share/doc/libregexp-grammars-perl/examples/demo_raw_debug.pl
/usr/share/doc/libregexp-grammars-perl/examples/demo_calc.pl
/usr/share/doc/libregexp-grammars-perl/NEWS.Debian.gz