B3311331313231311331322331333132333132313112331333132333132322331323133312121   >>    B331133131323131133132233133313233313231311233133313233313232233132313331212   <<    B3311331313231311331322331333132333132313112331333132333132322331323133312123   >>      B3311331313231311331322331333132333132313112331333132333132322331323133312122   >>