main riff
-----------------------------------------------------------
-----------------------------------------------------------
-----------------------------------------------------------
------2-----2--2-------------------2-----------------------
------2-----2--2--------0--2--0----2-----------------------
---0-----0--------0--3-----------3-------------------------
acoustic riff
-----------1--------------------1---------------------1---------------------1
--------1-----1-----1--------1-----1-----1---------1-----1-----1---------1---
-----2-----------2--------2-----------2---------2-----------2---------2------
--3--------------------3---------------------3---------------------3---------
--3--1-----------0---------------------0--------------------0----------------
--3--1--------0-----0-----0---------0-----0-----0--------0-----0-----0-------
--4--2-----1-----------1---------1-----------1--------1-----------1---------
--5--3--2---------------------2--------------------2--------------------2----
--------0--------------------------------------------------------------------
-----0-----0-----0-----------------------------------------------------------
--1-----------1--------------------------------------------------------------
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