D1212132333132233131323222313231323132313233231333132313232212131   >>    D121213233313223313132322231323132313231323323133313231323221213   <<    D1212132333132233131323222313231323132313233231333132313232212133   >>      D1212132333132233131323222313231323132313233231333132313232212132   >>