Line conversion to sorting in lexicographic order

How to convert a string consisting of words separated by spaces, and sort the resulting list in a lexicographic order?

is given a line from words separated by spaces:

  S =  'ABC a BCD BC ABC BC BCD BCD ABC'      
 We convert it to the "Space" "" Space "": 
  
  A = S.Split ( '' )     
 we get: 
  
  [ 'Abc' ,  '' a ', ' bcd ', ' bc ',  'Abc' ,  'bc' ,  'bcd' ,  '' bcd ',  'ABC' ]     
 class = ""> print  (a)     
 we will not get anything if: 
  
  b = a.sort ()   Print  (a)     
 We get the sorted list 
  
  [ 'ABC' ,  'Abc' ,  'bc' ,  '' "> '' bcd ', '` `` span>,  'ABC' ,  'bc' ,  'bcd' ,  '' "> ''"> '' "]   
  
 why? Is it possible to somehow combine sort () and split () in one line?