17
15
000001111110000
000111111111100
001111111111110
011111000011111
011100000000110
111100000000000
111000000000000
111000000000000
111000000000000
111000000000000
111000000000000
111100000000000
011100000000110
011110000011111
001111111111110
000111111111100
000001111110000
