B3311331313231311331322331333132313232233132332132313331333132213231311211321   >>    B331133131323131133132233133313231323223313233213231333133313221323131121132   <<    B3311331313231311331322331333132313232233132332132313331333132213231311211323   >>      B3311331313231311331322331333132313232233132332132313331333132213231311211322   >>