B3311331313231311331322331333132233131133132233133313231232322221   >>    B331133131323131133132233133313223313113313223313331323123232222   <<    B3311331313231311331322331333132233131133132233133313231232322223   >>      B3311331313231311331322331333132233131133132233133313231232322222   >>