---------------------------------------|
--4-4-4-4-4-4-4---4-4-4----------------|
--7-7-7-7-7-7-7---7-7-7----------------|
---------------------------------------|
---------------------------------------|
---------------------------------------|repeat a few times

---------------------------------------|
---------------------------4-4-4--4----|
---------------------------7-7-7--7----|
---------------------------------------|
---------------------------------------|
---------------------------------------|

--10---10---3---1---7----7--------|
--13---13---6---4---10---10-------|
----------------------------------|
----------------------------------|
----------------------------------|
----------------------------------|repeat a few times

----5--------5----------5-6-5--------------|
-----6--6-6---6--6-6------------8-6--6-6---|
-------------------------------------------|
-------------------------------------------|
-------------------------------------------|
-------------------------------------------|

----5--------5------------5--6--7--8--13---|
-----6--6-6---6--6-6-----------------------|
-------------------------------------------|
-------------------------------------------|
-------------------------------------------|
-------------------------------------------|

-6-6-5--------5------------5--6--6---------|
------6--6-6---6---6-6--------------8-6----|
-------------------------------------------|
-------------------------------------------|
-------------------------------------------|
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