11----1111---11--1---1-11-111--111-11-1---1--11---1111-----
1----11-1111-1-111-1-11-111-1--1-111-11-1-111-1-1111-11----
1--1----1111-1-1-1--1--1---11--11---1--1--1-1-1-1111----1--
1-----1---1-1--111111--1---111111---1--111111--1-1---1-----