class X {
	static X m() {
		return new X() {};
	}

	public static void main(String[] args) throws InstantiationException, IllegalAccessException {
		X x = m();
		X y = m();
		X z = x.getClass().newInstance();

		if (x.getClass() == y.getClass())
			System.out.println("yes");

		if (x.getClass() == z.getClass())
			System.out.println("yes");
	}
}