/usr/share/wordpress/ is in wordpress-theme-twentysixteen 4.4.2+dfsg-1ubuntu1.
This file is owned by root:root, with mode 0o755.
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/usr/share/wordpress/wp-content/
/usr/share/wordpress/wp-content/themes/
/usr/share/wordpress/wp-content/themes/twentysixteen/
/usr/share/wordpress/wp-content/themes/twentysixteen/404.php
/usr/share/wordpress/wp-content/themes/twentysixteen/archive.php
/usr/share/wordpress/wp-content/themes/twentysixteen/comments.php
/usr/share/wordpress/wp-content/themes/twentysixteen/css/
/usr/share/wordpress/wp-content/themes/twentysixteen/css/editor-style.css
/usr/share/wordpress/wp-content/themes/twentysixteen/css/ie.css
/usr/share/wordpress/wp-content/themes/twentysixteen/css/ie7.css
/usr/share/wordpress/wp-content/themes/twentysixteen/css/ie8.css
/usr/share/wordpress/wp-content/themes/twentysixteen/footer.php
/usr/share/wordpress/wp-content/themes/twentysixteen/functions.php
/usr/share/wordpress/wp-content/themes/twentysixteen/genericons/
/usr/share/wordpress/wp-content/themes/twentysixteen/genericons/Genericons.eot
/usr/share/wordpress/wp-content/themes/twentysixteen/genericons/Genericons.svg
/usr/share/wordpress/wp-content/themes/twentysixteen/genericons/Genericons.ttf
/usr/share/wordpress/wp-content/themes/twentysixteen/genericons/Genericons.woff
/usr/share/wordpress/wp-content/themes/twentysixteen/genericons/README.md
/usr/share/wordpress/wp-content/themes/twentysixteen/genericons/genericons.css
/usr/share/wordpress/wp-content/themes/twentysixteen/header.php
/usr/share/wordpress/wp-content/themes/twentysixteen/image.php
/usr/share/wordpress/wp-content/themes/twentysixteen/inc/
/usr/share/wordpress/wp-content/themes/twentysixteen/inc/back-compat.php
/usr/share/wordpress/wp-content/themes/twentysixteen/inc/customizer.php
/usr/share/wordpress/wp-content/themes/twentysixteen/inc/template-tags.php
/usr/share/wordpress/wp-content/themes/twentysixteen/index.php
/usr/share/wordpress/wp-content/themes/twentysixteen/js/
/usr/share/wordpress/wp-content/themes/twentysixteen/js/color-scheme-control.js
/usr/share/wordpress/wp-content/themes/twentysixteen/js/customize-preview.js
/usr/share/wordpress/wp-content/themes/twentysixteen/js/functions.js
/usr/share/wordpress/wp-content/themes/twentysixteen/js/html5.js
/usr/share/wordpress/wp-content/themes/twentysixteen/js/keyboard-image-navigation.js
/usr/share/wordpress/wp-content/themes/twentysixteen/js/skip-link-focus-fix.js
/usr/share/wordpress/wp-content/themes/twentysixteen/languages/
/usr/share/wordpress/wp-content/themes/twentysixteen/languages/twentysixteen.pot
/usr/share/wordpress/wp-content/themes/twentysixteen/page.php
/usr/share/wordpress/wp-content/themes/twentysixteen/readme.txt
/usr/share/wordpress/wp-content/themes/twentysixteen/rtl.css
/usr/share/wordpress/wp-content/themes/twentysixteen/screenshot.png
/usr/share/wordpress/wp-content/themes/twentysixteen/search.php
/usr/share/wordpress/wp-content/themes/twentysixteen/searchform.php
/usr/share/wordpress/wp-content/themes/twentysixteen/sidebar-content-bottom.php
/usr/share/wordpress/wp-content/themes/twentysixteen/sidebar.php
/usr/share/wordpress/wp-content/themes/twentysixteen/single.php
/usr/share/wordpress/wp-content/themes/twentysixteen/style.css
/usr/share/wordpress/wp-content/themes/twentysixteen/template-parts/
/usr/share/wordpress/wp-content/themes/twentysixteen/template-parts/biography.php
/usr/share/wordpress/wp-content/themes/twentysixteen/template-parts/content-none.php
/usr/share/wordpress/wp-content/themes/twentysixteen/template-parts/content-page.php
/usr/share/wordpress/wp-content/themes/twentysixteen/template-parts/content-search.php
/usr/share/wordpress/wp-content/themes/twentysixteen/template-parts/content-single.php
/usr/share/wordpress/wp-content/themes/twentysixteen/template-parts/content.php