class father 
{
	//Ա
	protected int x;
	//췽
	public father(){}
	public father(int x)
	{
		this.x=x;
	}
	//Ա
	public void print()
	{
		System.out.println("Уx="+x);
	}
}
class son extends father
{
	//ͬĳԱ
	int x;
	public son(int x)
	{
		this.x=x;
	}
	//ĸǣд
	public void print()
	{
		//ͬĳԱxб
		System.out.println("Уx="+x);		
	}
}
public class RedefinitionDemo4_10 {
	public static void main(String[] args) {
		father f=new father(10);
		son s=new son(15);
		f.print();			//øprint
		s.print();			//print
	}
}
