D121213233313223313132322231323132313231333132233132313232213311211231   >>    D12121323331322331313232223132313231323133313223313231323221331121123   <<    D121213233313223313132322231323132313231333132233132313232213311211233   >>      D121213233313223313132322231323132313231333132233132313232213311211232   >>