B3311331313231311331322331333132333133313132233133313233313231323331313123121   >>    B331133131323131133132233133313233313331313223313331323331323132333131312312   <<    B3311331313231311331322331333132333133313132233133313233313231323331313123123   >>      B3311331313231311331322331333132333133313132233133313233313231323331313123122   >>