1---111---1--11-----1---1-----1--11-111---------1----1--1-11111--1----1111--111
1-11--111--1--1-1-----111111-1--1--111-11-111--1--1-111111-----1-1--1--111--11-
11---1-11-111-111--11-11-1-1-1-11-1----------1-11-1-1-1-11-11--111-111-11-1---1
11-1--1---11---11-1-1-1-11111---1111--1--1--1111---11111-1-1-1-11---11---1--1-1