B3311331313231311331322331333132313232233132322223313231333132313311211111111   >>    B331133131323131133132233133313231323223313232222331323133313231331121111111   <<    B3311331313231311331322331333132313232233132322223313231333132313311211111113   >>      B3311331313231311331322331333132313232233132322223313231333132313311211111112   >>