------------0--1----1--0----------------0---0----e
--1----1--3---------------3--1----1--3---------3-b
-------------------------------------------------g
-------------------------------------------------d
-------------------------------------------------a
-------------------------------------------------e

------------0--1----1--0----------------0--------e
--1----1--3---------------3--1----1--3----0--1---b
-------------------------------------------------g
-------------------------------------------------d
-------------------------------------------------a
-------------------------------------------------e