D12121323331322331313232223132313231333132313223313231311331323132212111   >>    D1212132333132233131323222313231323133313231322331323131133132313221211   <<    D12121323331322331313232223132313231333132313223313231311331323132212113   >>      D12121323331322331313232223132313231333132313223313231311331323132212112   >>