B3311331313231311331322331333132333131333132233133313232233132313113313123121   >>    B331133131323131133132233133313233313133313223313331323223313231311331312312   <<    B3311331313231311331322331333132333131333132233133313232233132313113313123123   >>      B3311331313231311331322331333132333131333132233133313232233132313113313123122   >>