B3311331313231311331322331333132313233313231333131333133313233231323221121   >>    B331133131323131133132233133313231323331323133313133313331323323132322112   <<    B3311331313231311331322331333132313233313231333131333133313233231323221123   >>      B3311331313231311331322331333132313233313231333131333133313233231323221122   >>