D12121323331322331313232223132313231323133313223313231313221121   >>    D1212132333132233131323222313231323132313331322331323131322112   <<    D12121323331322331313232223132313231323133313223313231313221123   >>      D12121323331322331313232223132313231323133313223313231313221122   >>