20
27
110000000000111000000000011
110000000000111000000000011
011000000001101100000000110
011000000001101100000000110
011000000001101100000000110
011000000011000110000000110
001100000011000110000001100
001100000011000110000001100
001100000111000011000001100
001110000110000011000011100
000110000110000011000011000
000110001110000011100011000
000110001100000001100011000
000111001100000001100110000
000011011100000001110110000
000011011000000000110110000
000011011000000000110110000
000001111000000000111100000
000001110000000000011100000
000001110000000000011100000
