B33113313132313113313223313331323133313223313231333131133132313331333232212121
>>
B3311331313231311331322331333132313331322331323133313113313231333133323221212
<<
B33113313132313113313223313331323133313223313231333131133132313331333232212123
>>
B33113313132313113313223313331323133313223313231333131133132313331333232212122
>>