B3311331313231311331322331333132233131133132233133313231333131133132212323221   >>    B331133131323131133132233133313223313113313223313331323133313113313221232322   <<    B3311331313231311331322331333132233131133132233133313231333131133132212323223   >>      B3311331313231311331322331333132233131133132233133313231333131133132212323222   >>