B331133131323131133132233133313231323223313131133133313232223121
>>
B33113313132313113313223313331323132322331313113313331323222312
<<
B331133131323131133132233133313231323223313131133133313232223123
>>
B331133131323131133132233133313231323223313131133133313232223122
>>