read a text or a dictionary
 find each word and filter out rubbish (numbers, initials, etc)
 enter the words in a hash keyed on their last N chars
 - an attempt to rhyme.
 TeX::Hyphen hyphenates the words so it's better but misses
 out a lot of words.
 create a pattern for the sentence, (0,1,0,0,1,0)
 meaning: pick random word for first word,
 second word change the ending, (1) so pick up
 a random word with different ending.
 3rd word continue with same ending as previous (0)
 etc.