static S ai_ifAndInput(S rule, S input) {
  L<S> tok = javaTokDroppingBracketsC_unquote(rule);
  new Matches m;
  if (simpleStarMatchOnCTokensIC("if * and input * then say *", tok, m)) {
    if (!match($2, input)) null;
    ret $3;
  }
  null;
}