/usr/ is in libunistring-dev 0.9.3-5ubuntu3.
This file is owned by root:root, with mode 0o755.
..
/usr/share/doc/
/usr/share/doc/libunistring-dev/
/usr/lib/
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/libunistring.a
/usr/share/
/usr/share/info/
/usr/share/info/libunistring.info.gz
/usr/share/doc-base/
/usr/share/doc-base/libunistring-manual
/usr/share/doc/libunistring-dev/copyright
/usr/share/doc/libunistring-dev/html/
/usr/share/doc/libunistring-dev/html/libunistring_1.html
/usr/share/doc/libunistring-dev/html/libunistring_10.html
/usr/share/doc/libunistring-dev/html/libunistring_6.html
/usr/share/doc/libunistring-dev/html/libunistring_18.html
/usr/share/doc/libunistring-dev/html/libunistring_15.html
/usr/share/doc/libunistring-dev/html/libunistring_3.html
/usr/share/doc/libunistring-dev/html/libunistring_9.html
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/usr/share/doc/libunistring-dev/html/libunistring_8.html
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/usr/share/doc/libunistring-dev/html/libunistring_5.html
/usr/share/doc/libunistring-dev/html/libunistring_toc.html
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/usr/share/doc/libunistring-dev/html/libunistring_17.html
/usr/share/doc/libunistring-dev/html/libunistring_abt.html
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/usr/share/doc/libunistring-dev/html/libunistring_11.html
/usr/share/doc/libunistring-dev/html/libunistring_7.html
/usr/include/
/usr/include/uniwbrk.h
/usr/include/uniname.h
/usr/include/unitypes.h
/usr/include/unistring/
/usr/include/unistring/stdint.h
/usr/include/unistring/stdbool.h
/usr/include/unistring/iconveh.h
/usr/include/unistring/woe32dll.h
/usr/include/unistring/inline.h
/usr/include/unistring/localcharset.h
/usr/include/unistring/version.h
/usr/include/unistring/cdefs.h
/usr/include/unicase.h
/usr/include/uninorm.h
/usr/include/unictype.h
/usr/include/unilbrk.h
/usr/include/unistdio.h
/usr/include/uniconv.h
/usr/include/unistr.h
/usr/include/uniwidth.h
/usr/lib/x86_64-linux-gnu/libunistring.so
/usr/share/doc/libunistring-dev/AUTHORS
/usr/share/doc/libunistring-dev/THANKS
/usr/share/doc/libunistring-dev/NEWS.gz
/usr/share/doc/libunistring-dev/BUGS
/usr/share/doc/libunistring-dev/README
/usr/share/doc/libunistring-dev/changelog.Debian.gz