D1212121212131323131133132311233132313231323221333132333132333132322121131   >>    D121212121213132313113313231123313231323132322133313233313233313232212113   <<    D1212121212131323131133132311233132313231323221333132333132333132322121133   >>      D1212121212131323131133132311233132313231323221333132333132333132322121132   >>