19
15
111100000001111
111100000001111
111100000001111
111100000001111
111100000001111
111100000001111
111100000001111
111100000001111
111100000001111
111100000001111
111100000001111
111100000001111
111100000001111
111100000011111
111111000011111
011111111111110
011111111111110
001111111111100
000011111110000
