B3311331313231311331322331333132313233313231333131333133313232313331313221   >>    B331133131323131133132233133313231323331323133313133313331323231333131322   <<    B3311331313231311331322331333132313233313231333131333133313232313331313223   >>      B3311331313231311331322331333132313233313231333131333133313232313331313222   >>