I remember this was exam question long long long time ago.
There is a file say MyFile.txt, it can be any size and contains aphanumeric only
your task is to revese the words example : "Go beyond the traditional laptop with Surface Laptop. It's backed by the best of Microsoft, including Windows and Office"
It should be "Office and Windows including Microsoft, of best the by backed It's Laptop. Surface with laptop traditional the beyond Go"
The size of the text in the file is unknown.