-----------------------------------
-----------------------------------
-----------------------------------
----3-4-6-------------3-4-6--------
---2-----2-----------2-----2-------    x3
--2-------2-5-7-4-5-2-------2------


-----------------------------------
-----------------------------------
-----------------------------------
----7-8-9-------------7-8-9--------
---6-----6-----------6-----6-------
--6-------6-5-7-4-5-6-------6------
-----------------------------------
-----------------------------------
-----------------------------------
----3-4-6-------------3-4-6--------
---2-----2-----------2-----2-------    x3
--2-------2-5-7-4-5-2-------2------


-----------------------------------
-----------------------------------
-----------------------------------
----7-8-9-------------7-8-9--------
---6-----6-----------6-----6-------
--6-------6-5-7-4-5-6-------6------