B3311331313231311331322331333131133132313331313232213231333132322331   >>    B331133131323131133132233133313113313231333131323221323133313232233   <<    B3311331313231311331322331333131133132313331313232213231333132322333   >>      B3311331313231311331322331333131133132313331313232213231333132322332   >>