B3311331313231311331322331333131133132333132333133313223313231311331323121   >>    B331133131323131133132233133313113313233313233313331322331323131133132312   <<    B3311331313231311331322331333131133132333132333133313223313231311331323123   >>      B3311331313231311331322331333131133132333132333133313223313231311331323122   >>