20
19
0111000000000001110
0011100000000011100
0001110000000111000
0000110000000110000
0000011000001100000
0000011100011100000
0000001110111000000
0000000110110000000
0000000011100000000
0000000011100000000
0000000011100000000
0000000110110000000
0000001100011000000
0000011000011100000
0000111000001110000
0000110000000110000
0001100000000011000
0011100000000011100
0111000000000001110
1110000000000000111
