B3311331313231311331322331333132233131133132233133313231333132213123221   >>    B331133131323131133132233133313223313113313223313331323133313221312322   <<    B3311331313231311331322331333132233131133132233133313231333132213123223   >>      B3311331313231311331322331333132233131133132233133313231333132213123222   >>