B3311331313231311331322331333132313331322331323133313311211111312111113213111   >>    B331133131323131133132233133313231333132233132313331331121111131211111321311   <<    B3311331313231311331322331333132313331322331323133313311211111312111113213113   >>      B3311331313231311331322331333132313331322331323133313311211111312111113213112   >>