h---- k---- f---- s---- h h h h h h h h k k k k k k k k f f f f f f f f s s s s s s s s h h h h h h h h k k k k k k k k f f f f f f f f s s s s s s s s h---- k---- f---- s---- h h h h h h h h k k k k k k k k f f f f f f f f s s s s--- h h h h h h h h k k k k k k k k f f f f f f f f s s s s s s s s h h h h h h h h k k k k k k k k f f f f f f f f s---- h h h h h h h h k k k k k k k k f f f f f f f f s s s s s s s s h h h h h h h h k k k k k k k k f f f f f f f f---- h h h h h h h h k k k k k k k k f f f f f f f f s s s s s s s s h---- k---- f---- s---- h h h h h h h h k k k k k k k k f f f f f f f f s s s s s s s s h h h h h h h h k k k k k k k k f f f f f f f f s s s s s s s s h h h h h h h h k k k k k k k k f f f f f f f f s---- h h h h h h h h k k k k k k k k f f f f f f f f s s s s s s s s h h h h h h h h k k k k k k k k f f f f f f f f s s s s s s s s h