static class LastWordToLower extends P {
  S read(S file, L<S> tok) {
    if (tok.size() < 2) return null;
    S t = tok.get(tok.size()-2);
    if (t.length() == 0) return null;
    if (Character.isUpperCase(t.charAt(0)))
      return t.toLowerCase();
    return null;
  }
  
  P derive() {
    return this;
  }
  
  P clear() {
    return this;
  }
}