+------------------------+
+------------------------+
+------------------------+
+---0-0---2-3------------+
+------------------------+
+------------------------+
+-----------------------+
+-----------------------+
+-----------------------+
+--5-5---7-8------------+
+-----------------------+
+-----------------------+
+-----------------------+
+-----------------------+
+-----------------------+
+--3-3---5-6------------+
+-----------------------+
+-----------------------+
+------------------------+
+------------------------+
+------------------------+
+---1-1---3-4------------+
+------------------------+
+------------------------+
