#!/usr/bin/perl -w
use utf8;

while (<>) {
  s/ /\n/g; # split lines on space 
### you might want to add a some abbreviation protection here later
  s/([^\w\n])/\n$1\n/g; # separate punctuation from words
  s/\n\n+/\n/g; # clean up on multiple line breaks
  print;
}