20
20
00000001111110000000
00001111111111110000
00011110000001111000
00111000000000011100
01110000000000001110
01100000000000000110
01100000000000000110
11000000000000000011
11000000000000000011
11000000000000000011
11000000000000000011
11000000000000000011
11000000000000000011
01100000000000000110
01100000000000000110
01110000000000001110
00111000000000011100
00011110000001111000
00001111111111110000
00000001111110000000
