B3311331313231311331322331333132333133313231332113313331333132313223313123121   >>    B331133131323131133132233133313233313331323133211331333133313231322331312312   <<    B3311331313231311331322331333132333133313231332113313331333132313223313123123   >>      B3311331313231311331322331333132333133313231332113313331333132313223313123122   >>