18
17
11100000000000111
01110000000001110
01110000000001110
01111000000011110
00111000000011100
00111000000011100
00011100000111000
00011100000111000
00011110001111000
00001110001110000
00001110001110000
00000111011100000
00000111011100000
00000011111000000
00000011111000000
00000011111000000
00000001110000000
00000001110000000
