B3311331313231311331322331333131133132333132333133313223313232313232212121
>>
B331133131323131133132233133313113313233313233313331322331323231323221212
<<
B3311331313231311331322331333131133132333132333133313223313232313232212123
>>
B3311331313231311331322331333131133132333132333133313223313232313232212122
>>