------------------------------5--5--5--5------------------5--5--5--------------5-5-5-
---------6-6-6-6----------------6--6--6---------------------3--3---------------------
-2-2-2-----------4-4-4-4--4-4-4-4--------------7-7-7-7-7-7-7-----7-7---------6-6-6-6-
--0-0-0-0---------------------------------5-5-5-------------------------1-1-1--------