20
16
1111000000001111
1111000000001111
1111000000001111
1111000000001111
1111000000001111
1111000000001111
1111000000001111
1111000000001111
1111000000001111
1111000000001111
1111000000001111
1111000000001111
1111000000001111
1111000000001111
1111100000001111
1111110000111111
0111111111111110
0111111111111110
0011111111111100
0000111111110000
