B3311331313231311331322331333132322331313231211113313112211232321   >>    B331133131323131133132233133313232233131323121111331311221123232   <<    B3311331313231311331322331333132322331313231211113313112211232323   >>      B3311331313231311331322331333132322331313231211113313112211232322   >>