Doobie Thing
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--7--7-8-9-10----5--5-5-8---------------
--x--------------x----------------3----- repeat a bunch (after listening
--x--5-6-7-8-----x--3-5-6-----7\-------- you'll remember how many)
--6--------------4---------7----1---1---

last time before switch
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--7--7-8-9-10----5--5-7-8--5-8-7-5-----
--x--------------x-------------------3-
--5--5-6-7-8-----3--3-5-6--3-6-5-3-----
--6--------------4-----------------1---

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--7 <--pinky
--x
--5 <--index finger
--6 <--middle finger

then just release the middle finger a bit to get those
octaves and just slide your index and pinky up along.

Fast Chorus
--3--3--3--3--
--3--3--3--3--
--0--0--0--2--
--0--0--2--0-- repeat
--2--2--3--0--
--3-----------