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 ~~~
4-------------------------------------3-2-3-2---|