- 2------ --- -5----4
- --------1 ---- ------6--
- 4--- --- --1--
- --7--5- --- -- --- 6----
- --7----- 6-----5--7
- -1- --- 2-- --5 -- --- ---
- ---- -3-- --7 2-4--
- 3--7-, -6---- --4 ----
- -3--- -- --7-
- -5--- --- ---6-
- --- ---3 -- -45----
- ---6-5--- -1---
- 3----7- --- --- 5---- ---- -- ---2