rule N2N
	transform s : In!t_n
	to t : Out!t_n {
	
	t.a_label = s.a_label;
	
	if (s == In.root) {
		Out.root = t;
	}
	else {
		s.parentNode.equivalent().appendChild(t);
		
		var copy = new Out!t_n;
		copy.a_label = s.a_label + "_copy";
		s.parentNode.equivalent().appendChild(copy);
		
	}
		
}