& words()
 
  Syntax: words(<string>[, <delim>])
 
  Returns the number of words in <string>. <delim> may be used to 
  specify a delimiter other than a space.
 
  Example:
 
  > say words(This is a test)
  You say "4"
  say words(Would you like coffee or perhaps tea?)
  > You say "7"
  say words(This:is:a:colon:separated:list,:)
  > You say "6"