---------------------------------------
---------------------------------------
-----------------0-2-0-----------------
-------0-2-0-2-3-----------------------
-3-2-3---------------------------------
---------------------------------------
---------------------------------------
---------------------------------------
-----------------0-2-0-----------------
-------0-2-0-2-3-----------------------
-3-2-3---------------------------------
---------------------------------------
---------------------------------------
-1-------------------------------------
---0-0-2-0---------2-0-----------0-----
-----------3-2-3-3-----3-2-0-2-3---2-0-
---------------------------------------
---------------------------------------