import org.w3c.dom.Node;
import org.w3c.dom.Text;

import java.util.ArrayList;
import java.util.LinkedList;
import java.util.List;

class DocBookBuilder {
    final LinkedList<Element> stack = new LinkedList<Element>();
    final Document document;

    DocBookBuilder(Document document) {
        this.document = document;
        stack.addFirst(document.createElement("root"));
    }

    List<Element> getElements() {