D1212121212131323131133132311233132313231323221333132333132333131132211   >>    D121212121213132313113313231123313231323132322133313233313233313113221   <<    D1212121212131323131133132311233132313231323221333132333132333131132213   >>      D1212121212131323131133132311233132313231323221333132333132333131132212   >>