B3311331313231311331322331333132313231333133313311211111323221111   >>    B331133131323131133132233133313231323133313331331121111132322111   <<    B3311331313231311331322331333132313231333133313311211111323221113   >>      B3311331313231311331322331333132313231333133313311211111323221112   >>