B3311331313231311331322331333131133133313111333133313331323133313232111   >>    B331133131323131133132233133313113313331311133313331333132313331323211   <<    B3311331313231311331322331333131133133313111333133313331323133313232113   >>      B3311331313231311331322331333131133133313111333133313331323133313232112   >>