B3311331313231311331322331333132313331323133313233313331311331333133112233121   >>    B331133131323131133132233133313231333132313331323331333131133133313311223312   <<    B3311331313231311331322331333132313331323133313233313331311331333133112233123   >>      B3311331313231311331322331333132313331323133313233313331311331333133112233122   >>