D1212121212131323331323231323132312323132322331311331323132333132223321   >>    D121212121213132333132323132313231232313232233131133132313233313222332   <<    D1212121212131323331323231323132312323132322331311331323132333132223323   >>      D1212121212131323331323231323132312323132322331311331323132333132223322   >>