B3311331313231311331322331333132313331322121133133313331333133313211231221   >>    B331133131323131133132233133313231333132212113313331333133313331321123122   <<    B3311331313231311331322331333132313331322121133133313331333133313211231223   >>      B3311331313231311331322331333132313331322121133133313331333133313211231222   >>