I was trying to find the intro riff to Eighteen but I couldn't so I decided to try and 
figure it out myself. I based this off the Eighteen acoustic in the 5SOS birthday twitcam 
and I'm 99% sure it's correct.

Let me know if you find any mistakes:)

Twitter: @riotirwin

h means hammer on, optional but definitely recommended


e | ---------------------------- |
b | ---------------------------- |
g | ---------------------------- |
d | ---------------------------- |
a | ----0-4h5-4-2-0------------- |
e | --5---------------2-2--3-3-- |