istream& operator>>(istream& is, reflex& r);
{
	string line;

	//Input the pattern.
	if (!getline(is, line)) {
		is.clear(ios_base::badbit);
		return is;
	}
	r.pattern = chop(line);

	//Input one or more responses.
	while (getline(is, line) && line != "") {
		r.responses.push_back(chop(line));
	}

	if (r.responses.empty()) {
		is.clear(ios_base::badbit);
		return is;
	}

	random_shuffle(r.responses.begin(), r.responses.end());
	r.current = r.responses.begin();
	return is;
}