B3311331313231311331322331333132313331323133313233313331333133313223113121   >>    B331133131323131133132233133313231333132313331323331333133313331322311312   <<    B3311331313231311331322331333132313331323133313233313331333133313223113123   >>      B3311331313231311331322331333132313331323133313233313331333133313223113122   >>