-------12-------------0-0h1-0----12-----------17-15-13-12----
----10----13-12-13------------10----13-12-13-----------------
------------------------------------------------------------- x3
-------------------------------------------------------------
---0----------------0--------0---------------0---------------
-------------------------------------------------------------
-------12-------------0-0h1-0----12--------------10-12-10--8-
----10----13-12-13------------10----13-12-13----12----12--10-
-------------------------------------------------------------
-------------------------------------------------------------
---0----------------0--------0----------------0--------------
-------------------------------------------------------------
---5-
---6-
---7- usar este Dm
---7-
---5-