B3311331313231311331322331333132313231333133313311211113313331323331322212131   >>    B331133131323131133132233133313231323133313331331121111331333132333132221213   <<    B3311331313231311331322331333132313231333133313311211113313331323331322212133   >>      B3311331313231311331322331333132313231333133313311211113313331323331322212132   >>