B3311331313231311331322331333131133132333132213231333132313232223221   >>    B331133131323131133132233133313113313233313221323133313231323222322   <<    B3311331313231311331322331333131133132333132213231333132313232223223   >>      B3311331313231311331322331333131133132333132213231333132313232223222   >>