/usr/lib/Wt/examples/planner/ is in witty-examples 3.3.0-1build1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/Wt/examples/planner/AllEntriesDialog.C
/usr/lib/Wt/examples/planner/AllEntriesDialog.h
/usr/lib/Wt/examples/planner/CMakeLists.txt
/usr/lib/Wt/examples/planner/CalendarCell.C
/usr/lib/Wt/examples/planner/CalendarCell.h
/usr/lib/Wt/examples/planner/Entry.h
/usr/lib/Wt/examples/planner/EntryDialog.C
/usr/lib/Wt/examples/planner/EntryDialog.h
/usr/lib/Wt/examples/planner/Login.C
/usr/lib/Wt/examples/planner/Login.h
/usr/lib/Wt/examples/planner/MyCaptcha.C
/usr/lib/Wt/examples/planner/MyCaptcha.h
/usr/lib/Wt/examples/planner/PlannerApplication.C
/usr/lib/Wt/examples/planner/PlannerApplication.h
/usr/lib/Wt/examples/planner/PlannerCalendar.C
/usr/lib/Wt/examples/planner/PlannerCalendar.h
/usr/lib/Wt/examples/planner/README.md
/usr/lib/Wt/examples/planner/Shape.C
/usr/lib/Wt/examples/planner/Shape.h
/usr/lib/Wt/examples/planner/ShapesWidget.C
/usr/lib/Wt/examples/planner/ShapesWidget.h
/usr/lib/Wt/examples/planner/TimeSuggestions.C
/usr/lib/Wt/examples/planner/TimeSuggestions.h
/usr/lib/Wt/examples/planner/UserAccount.C
/usr/lib/Wt/examples/planner/UserAccount.h
/usr/lib/Wt/examples/planner/calendar.xml
/usr/lib/Wt/examples/planner/captcha.xml
/usr/lib/Wt/examples/planner/planner
/usr/lib/Wt/examples/planner/planner.C
/usr/lib/Wt/examples/planner/planner.css
/usr/lib/Wt/examples/planner/planner.wt
/usr/lib/Wt/examples/planner/planner.xml
/usr/lib/Wt/examples/planner/resources