Intro:
AbI-----7-2-3-----------------------------------------------I
BbI-5-5--------5-5-7-8--3-3-7-8-10-8-7-8--------------------I
GbI---------------------------------------------------------I
DbI---------------------------------------------------------I
AbI---------------------------------------------------------I
EbI---------------------------------------------------------I
AbI-----7-2-3-----------------------------------------------I
BbI-5-5--------5-5-7-8--3-3-7-8-8-7-5-7---------------------I
GbI---------------------------------------------------------I
DbI---------------------------------------------------------I
AbI---------------------------------------------------------I
EbI---------------------------------------------------------I