B3311331313231311331322331333131133133313233213231333133313113313232212121111   >>    B331133131323131133132233133313113313331323321323133313331311331323221212111   <<    B3311331313231311331322331333131133133313233213231333133313113313232212121113   >>      B3311331313231311331322331333131133133313233213231333133313113313232212121112   >>