----3--------3--------3-----3--------3--------3-----2--------2--------2----|
-------3--------3--------3-----3--------3--------3-----3--------3--------3-|
----------0--------0--------------0--------0--------------2--------2-------|
----------------------------------------------------0----------------------|
----------------------------2----------------------------------------------|
----3----------------------------------------------------------------------|
----2--------2--------2-----0--------0--------0-----0--------0--------0----|
-------3--------3--------3-----0--------0--------0-----0--------0--------0-|
----------2--------2--------------0--------0--------------0--------0-------|
----0-----------------------------------------------2----------------------|
----------------------------2----------------------------------------------|
---------------------------------------------------------------------------|
----3--------3--------3-----3--------3--------3--------|
-------3--------3--------3-----3--------3--------3-----|
----------0--------0--------------0--------0-----------|
----------------------------2--------------------------| x2
----3--------------------------------------------------|
-------------------------------------------------------|
