1.---------------------------------------------------------------------------------
2.----------------------------------------------------------------------------------
3.----------------------------------------------------------------------------------
4.--7-7------3-3--2-2---7-7------3-3--2-2---7-7------3-3--2-2---7-7------3-3--2-2---
5.--7-7------3-3--2-2---7-7------3-3--2-2---7-7------3-3--2-2---7-7------3-3--2-2---
6.--5-5-5-5--1-1--------5-5-5-5--1-1--------5-5-5-5--1-1--------5-5-5-5--1-1--------

1.-----------------------
2.-----------------------
3.-----------------------
4.-7-7--5-5--3-3---5-5...
5.-7-7--5-5--3-3---3-3...
6.-5-5--3-3--1-1---1-1...