B3311331313231311331322331333131133133313232233312121211111323221   >>    B331133131323131133132233133313113313331323223331212121111132322   <<    B3311331313231311331322331333131133133313232233312121211111323223   >>      B3311331313231311331322331333131133133313232233312121211111323222   >>