Amnesia

[Intro/Main Riff]
E|--------------------------------
B|--------------------------------
G|--------------------------------
D|-6-7-6--9-----------------------
A|-7-7-7--7--6-7-6--9-------------
E|-----------0-0-0--0-------------

[Prechorus]
Then there’s a pre-chorus section 
where there’s strumming
and that’s just an A chord(x02220).
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The strumming pattern is:
D DU D D DUDUD DUDU

[Chorus]
And finally, in the chorus, you can 
either stick
with the main riff or play an E 
chord(022100).
That strumming pattern is:
DUD D DUD D (Which is the same 
timing as the riff.)