D1212132333132213231333132213231323331323331313112223313232222221   >>    D121213233313221323133313221323132333132333131311222331323222222   <<    D1212132333132213231333132213231323331323331313112223313232222223   >>      D1212132333132213231333132213231323331323331313112223313232222222   >>