B3311331313231311331322331333132313331322331323133313311211111211213231121   >>    B331133131323131133132233133313231333132233132313331331121111121121323112   <<    B3311331313231311331322331333132313331322331323133313311211111211213231123   >>      B3311331313231311331322331333132313331322331323133313311211111211213231122   >>