B3311331313231311331322331333132313231333131323223313133313331323331313312121   >>    B331133131323131133132233133313231323133313132322331313331333132333131331212   <<    B3311331313231311331322331333132313231333131323223313133313331323331313312123   >>      B3311331313231311331322331333132313231333131323223313133313331323331313312122   >>