import java.util.List;

public class Node23<T> {

    public T value;
    public List<Node23<T>> children;
    public Node23<T> parent;

    public Node23() {
        this(null, null, null);
    }

    public Node23(Node23<T> parent, T value) {
        this(parent, value, null);
    }

    public Node23(Node23<T> parent, T value, List<Node23<T>> children) {
        this.parent = parent;
        this.value = value;
        this.children = children;
    }
}