20
17
11110000000011111
11110000000111110
11110000001111100
11110000011111000
11110000111110000
11110001111100000
11110011111000000
11110111110000000
11111111111000000
11111111111000000
11111111111100000
11111100111110000
11111000011110000
11110000011111000
11110000001111000
11110000001111100
11110000000111100
11110000000011110
11110000000011111
11110000000001111
