B3311331313231311331322331333132313231333131323223313233313231323132231221   >>    B331133131323131133132233133313231323133313132322331323331323132313223122   <<    B3311331313231311331322331333132313231333131323223313233313231323132231223   >>      B3311331313231311331322331333132313231333131323223313233313231323132231222   >>