B3311331313231311331322331333132313231333133313311211113313221123313223111   >>    B331133131323131133132233133313231323133313331331121111331322112331322311   <<    B3311331313231311331322331333132313231333133313311211113313221123313223113   >>      B3311331313231311331322331333132313231333133313311211113313221123313223112   >>