20
17
01111000000011110
01111100000111110
00111110001111100
00011110001111000
00011111011111000
00001111111110000
00000111111100000
00000111111100000
00000011111000000
00000011111000000
00000111111100000
00000111111100000
00001111111110000
00001111011110000
00011110011111000
00111110001111100
00111100000111100
01111100000111110
11111000000011111
11110000000001111
