1---------------------------------------------
2-----------------------------------------
3------------------------------------------------------
4---------------2---------------------------------------
5--------2--0-4-------2---0-2-0-2--------------------------------
6----0-4----------0-4--------------0-2------------------------
6----------------------------------------
5------------------------------------------------
4------------------------------------------------------
3----------------2----2-2---------------------------------
2--------2--0-4-------------5-4-2-0---------------------------
1----0-4-------------------------------------------------
version para principiantes