D1212121212131323331312323132322331313232233132332313331323132322121121   >>    D121212121213132333131232313232233131323223313233231333132313232212112   <<    D1212121212131323331312323132322331313232233132332313331323132322121123   >>      D1212121212131323331312323132322331313232233132332313331323132322121122   >>