B3311331313231311331322331333132313331322331323133313231331123121212121   >>    B331133131323131133132233133313231333132233132313331323133112312121212   <<    B3311331313231311331322331333132313331322331323133313231331123121212123   >>      B3311331313231311331322331333132313331322331323133313231331123121212122   >>