E--------0----------------0-1-0--------0-1-0-------------------------- b--1-1-3----1-1-0---1-1-3------3--1-1-3------3-1-0-----0-1-1---------- g-----------------0--------------------------------0-2---------------- d--------------------------------------------------------------------- a--------------------------------------------------------------------- e--------------------------------------------------------------------- e-3-3-1-0--3-3-1-0-----0-1-0-0-0-----3-3-1-0--3-3-1-0----0-1-0-0-0---- b------------------3-3--------------------------------3-3------------- g--------------------------------------------------------------------- d--------------------------------------------------------------------- a--------------------------------------------------------------------- e--------------------------------------------------------------------- repeat the 1st part