(intro)
---2---------0---
---2---------0---
---3---------3---
---4---------4---
---4---------4---
---2---------2---

----------------------------------------------------------
----------------------------------------------------------
----------------------------------------------------------
-4-4-x-x-x-x-4-4-x-x-x-x----------------------------------
-4-4-x-x-x-x-4-4-x-x-x-x----------------------------------
-2-2-x-x-x-x-2-2-x-x-x-x----------------------------------

(refr?o)

 C               E               G               A9
-----0-------0-------0-------0-------3-------3-------0-------0---------
----1-1-----1-1-----0-0-----0-0-----3-3-----3-3-----0-0-----0-0--------
---0---0---0---0---1---1---1---1---4---4---4---4---6---6---6---6-------
--2-----2-2-----2-2-----2-2-----2-5-----5-5-----5-7-----7-7-----7------
-3-------3-------------------------------------------------------------
-----------------0-------0-------3-------3-------5-------5-------------