(define S #<<
---------- Ice and Fire ------------

fire, in end will world the say Some
ice. in say Some
desire of tasted I've what From
fire. favor who those with hold I

... elided paragraph last ...

Frost Robert -----------------------
>>#)
			
(for-each writeln
    (for/list ((line (string-split S "\n")))
        (string-join (reverse (string-split line " ")) " ")))