D12121323331322331313232223132313231333132313223313231312122311   >>    D1212132333132233131323222313231323133313231322331323131212231   <<    D12121323331322331313232223132313231333132313223313231312122313   >>      D12121323331322331313232223132313231333132313223313231312122312   >>