B3311331313231311331322331333132313232233132313133313331323132312312112121   >>    B331133131323131133132233133313231323223313231313331333132313231231211212   <<    B3311331313231311331322331333132313232233132313133313331323132312312112123   >>      B3311331313231311331322331333132313232233132313133313331323132312312112122   >>