16
21
110000000111000000011
110000000111000000011
011000001101100000110
011000001101100000110
011000001101100000110
011000001101100000110
001100011000110001100
001100011000110001100
001100011000110001100
001100011000110001100
000110110000011011000
000110110000011011000
000110110000011011000
000110110000011011000
000011100000001110000
000011100000001110000
