Report the bug of sort command

[qiwensheng]

Dear Sir or Madam:

I made a file named words.txt.  And it's content as follow:



But I use the "sort -r " command line (sort  -r  words.txt ) for this file,
and it displays as follow:



So, the result of it does not all reverse the original file in fact. 

Can you give me an explanation of this phenomenon?

Thank you very much!

Best wishes!

Your Clint qi