B3311331313231311331322331333132313331322121133133313331313232212131   >>    B331133131323131133132233133313231333132212113313331333131323221213   <<    B3311331313231311331322331333132313331322121133133313331313232212133   >>      B3311331313231311331322331333132313331322121133133313331313232212132   >>