1st part: x3
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[-----------------------------3-7-----3-7-------]
[-13-14-13-14-13-14-9-12-10-7-----7-9-----9-10--]
[-----------------------------------------------]
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2nd part:
[-----------------------------------------------]
[-----------------------------------------------]
[-12-10-9-7-9-10-12-14-15-14-12-14-12-10-12-10-9]
[-----------------------------------------------]