Вступление:

2---3-3-3--3-3-3-2-3-2-3-3------------------------|
3----------------------------------2-2-3-3--------------|   x2       
4---------------------------------------------3-2-3-2---|


2---12-12-12-11-12-12-12-11-12-11-12-12---------------------------------------|
3----------------------------------------------------------11-11-12-12---------------------|   x2
4----------------------------------------------------------------------------12-11-12-11---|


2---3-3-3-2-3-3-3-2-3-2-3-3-------------------------|
3------------------------------------2-2-3-3--------------|   x2   Hm~~~
4-----------------------------------------------3-2-3-2---|