D12121323331322331313232223132313231333132313223313231232313232212321   >>    D1212132333132233131323222313231323133313231322331323123231323221232   <<    D12121323331322331313232223132313231333132313223313231232313232212323   >>      D12121323331322331313232223132313231333132313223313231232313232212322   >>