B3311331313231311331322331333132313233313231333131333133313232213121121   >>    B331133131323131133132233133313231323331323133313133313331323221312112   <<    B3311331313231311331322331333132313233313231333131333133313232213121123   >>      B3311331313231311331322331333132313233313231333131333133313232213121122   >>