D1212121212131323331312323132322331323132333132313233313331323331323123221   >>    D121212121213132333131232313232233132313233313231323331333132333132312322   <<    D1212121212131323331312323132322331323132333132313233313331323331323123223   >>      D1212121212131323331312323132322331323132333132313233313331323331323123222   >>