I need to write a function $`$alicewords$/2`$ that reads in $`$alice$.$txt$`$ and splits it into words using $`$split$\_$string$/4`.$ I must split on spaces and remove leading or trailing spaces.

This appears to work, but I don't understand why it works. Can you help explain this concept to me$?$ Thank you so much

alicewords$($WordCount$)$ :$-$

open$(\text{'}$alice$.$txt$\text{'},$ read, Str$),$

read$\_$string$($Str$,\_,$ Text$),$

split$\_$string$($Text$,"","",$ Words$),$

length$($Words$,$ WordCount$),$

close$($Str$).$