B3311331313231311331322331333132322331323231333133313331313231322121   >>    B331133131323131133132233133313232233132323133313331333131323132212   <<    B3311331313231311331322331333132322331323231333133313331313231322123   >>      B3311331313231311331322331333132322331323231333133313331313231322122   >>