---------------|
---------------|
---(b9)-(b9)---(b9)--|
---(b9)-(b9)---(b9)--|
---7--7----7---|
---------------|

------------------------------------------------------------|
---12-12---------12-12---------12-12------------------------|
-----------(b9)(b9)----------(b9)(b9)----------(b9)(b9)--8-8---(b9)(b9)-----|
------------------------------------------------------------|
------------------------------------------------------------|
------------------------------------------------------------|

------------------------------------------------------------|
---12-12---------12-12---------12-12------------------------|
-----------(b9)(b9)----------(b9)(b9)----------(b9)(b9)--8-8---6-6------|
------------------------------------------------------------|
------------------------------------------------------------|
------------------------------------------------------------|

------------------------------------------------------------|
---12-12---------12-12---------12-12------------------------|
-----------(b9)(b9)----------(b9)(b9)----------(b9)(b9)--8-8---(b9)(b9)-----|
------------------------------------------------------------|
------------------------------------------------------------|
------------------------------------------------------------|

----------------------------------12---12---12--------------|
---12-12---------12-12------------12---12---12--------------|
-----------(b9)(b9)----------(b9)(b9)-----12---12---12--------------|
------------------------------------------------------------|
------------------------------------------------------------|
------------------------------------------------------------|