11---11-11----1-1-1-1--11111111--1-1-1-1----11-11----
1---11-1-1--11-1--111111-1111-111111--1-11--1-1-11---
1-1111--1---1-----1111-11----11-1111-----1---1--1111-
1---1-11---1-11---1----11-11-11----1---11-1---11-1---