1--------------------------------------------------------------
2--------------------------------------------------------------
3--9-7----7-------------------9-7----9-9--7--------------------
4------9--------5-5--7-------------9----------------------------
5----------------------7---------------------------------------
6--------------------------------------------------------------
(x2)
1---------------------------------------------------------------
2---------------------------------------------------------------
3--9--7-----7---12e---------------------------------------------
4 -------9-----------------------------------------------------
5--------------------------------------------------------------
6---------------------------------------------------------------
referencias:
e: estirar