/usr/ is in libkf5kmahjongglib-dev 4:15.12.3-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/cmake/
/usr/lib/x86_64-linux-gnu/cmake/KF5KMahjongglib/
/usr/lib/x86_64-linux-gnu/cmake/KF5KMahjongglib/KF5KMahjonggLibraryDepends-debian.cmake
/usr/lib/x86_64-linux-gnu/cmake/KF5KMahjongglib/KF5KMahjongglibConfigVersion.cmake
/usr/lib/x86_64-linux-gnu/cmake/KF5KMahjongglib/KF5KMahjonggLibraryDepends.cmake
/usr/lib/x86_64-linux-gnu/cmake/KF5KMahjongglib/KF5KMahjongglibConfig.cmake
/usr/include/
/usr/include/KF5/
/usr/include/KF5/KF5KMahjongg/
/usr/include/KF5/KF5KMahjongg/kmahjonggbackground.h
/usr/include/KF5/KF5KMahjongg/kmahjonggtileset.h
/usr/include/KF5/KF5KMahjongg/kmahjonggconfigdialog.h
/usr/include/KF5/KF5KMahjongg/kmahjongglib_version.h
/usr/include/KF5/KF5KMahjongg/libkmahjongg_export.h
/usr/share/
/usr/share/doc/
/usr/share/doc/libkf5kmahjongglib-dev/
/usr/share/doc/libkf5kmahjongglib-dev/copyright
/usr/lib/x86_64-linux-gnu/libKF5KMahjongglib.so
/usr/share/doc/libkf5kmahjongglib-dev/changelog.Debian.gz