!7

static JTextArea ta;

p-substance {
  ta = showText("");
  onChangeAndNow(ta, r {
    S w = firstWord(getText(ta));
    print("First word: " + w);
    
    /*
      w is the first word in x.
      Is x a letter (1) or a program (2)?
    */
    S riddle = quote(w) + " is the first word in x. Is x a letter (1) or a program (2)?";
    L<S> l = splitIntoSentences(riddle);
    psl(l);
  });
}

sS firstWord(S s) {
  if (empty(s)) ret "";
  if (isLetterOrDigit(first(s)))
    ret takeCharsWhile(s, f isLetterOrDigit);
  else ret "" + first(s);
}