intro
-2-2-3-2-2-2--------------------------------
-2-2-3-2-2-2---------------------------------
-2-2-3-2-2-2---------------------------------
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--------------5(x8)-7(x8)-9(x8)---------------------
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-----3-3-5-5-7-7-----5-5-3-3----------------------
-5-5-------------5-5---------5-5--------------
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--5-5-4----------------------5-5-4-----------
--------5-5----3-5-7---3-5-7-------5-5-----------
-------------5-------5-------------------
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--------------------4/6(x8)-------------------
---3-5-7-----3-5-7---------------------------
-5--------5------------------------------
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----3-5-7-----3-2-1------------------------
-55--------55------------------------------
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