B3311331313231311331322331333132313331322331323133313331333121333132213121   >>    B331133131323131133132233133313231333132233132313331333133312133313221312   <<    B3311331313231311331322331333132313331322331323133313331333121333132213123   >>      B3311331313231311331322331333132313331322331323133313331333121333132213122   >>