public class Node<T>
{
    public T data; 
    public Node<T> next;
    
    public Node()
    {
        data = null;
        next = null;
    }
    
    public Node(T data)
    {
        this.data = data;
        this.next = null;
    }
    
    public Node(T data, Node<T> next)
    {
        this.data = data;
        this.next = next;
    }
    
   public String toString()
   {
       return data.toString();
    }

}