B3311331313231311331322331333132313331322331323133313331323311331322312121   >>    B331133131323131133132233133313231333132233132313331333132331133132231212   <<    B3311331313231311331322331333132313331322331323133313331323311331322312123   >>      B3311331313231311331322331333132313331322331323133313331323311331322312122   >>