D1212121212131323131133132311233132313231323221333132333132321123111   >>    D121212121213132313113313231123313231323132322133313233313232112311   <<    D1212121212131323131133132311233132313231323221333132333132321123113   >>      D1212121212131323131133132311233132313231323221333132333132321123112   >>