------111111101111111------
-----11110111111101111-----
----1110000011100000111----
---011100000111000001110---
--11111110111111101111111--
-1111011111110111111101111-
111000001110000011100000111
111000001110000011100000111
-1111011111110111111101111-
--11111110111111101111111--
---011100000111000001110---
----1110000011100000111----
-----11110111111101111-----
------111111101111111------