0xxxxxxxxxxxxxx0xxxxxxxxx accept
1x0x0x0x0x10101011x0x0x0 accept
00xxxx00x reject
0000 reject
x000111 reject
1x0x0x010x0x0x1x0x0 reject
1x1010101010101010101 accept
0x1x1x1x1x1x1x1x1x00000xxxx accept
0x1x0x1x0x1x0x reject
1x000x000x000 reject
0x000x000x000 reject
0x111x000x111 accept
