B3311331313231311331322331333132313231333131323223313232313231221   >>    B331133131323131133132233133313231323133313132322331323231323122   <<    B3311331313231311331322331333132313231333131323223313232313231223   >>      B3311331313231311331322331333132313231333131323223313232313231222   >>