19
18
000000111111000000
000011111111110000
000111000000111000
001100000000011100
011000000000001110
011000000000000110
110000000000000011
110000000000000011
110000000000000011
110000000000000011
110000000000000011
110000000000000011
110000000000000011
011000000000000110
011000000000000110
001100000000001100
000111000000111000
000011111111110000
000000111111000000
