B3311331313231311331322331333131133132333132333133313223313231323132213111   >>    B331133131323131133132233133313113313233313233313331322331323132313221311   <<    B3311331313231311331322331333131133132333132333133313223313231323132213113   >>      B3311331313231311331322331333131133132333132333133313223313231323132213112   >>