D12121323331322331313232223132313231333132313223313232212323311   >>    D1212132333132233131323222313231323133313231322331323221232331   <<    D12121323331322331313232223132313231333132313223313232212323313   >>      D12121323331322331313232223132313231333132313223313232212323312   >>