B3311331313231311331322331333132313331323133313233313232233132222221   >>    B331133131323131133132233133313231333132313331323331323223313222222   <<    B3311331313231311331322331333132313331323133313233313232233132222223   >>      B3311331313231311331322331333132313331323133313233313232233132222222   >>