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class Person
{
	private String name;
	private String location;
	Person(String name)
	{
		this.name = name;
		location = "beijing";
	}
	Person(String name,String location)
	{
		this.name = name;
		this.location = location;
	}
	public String info()
	{
		return "name: "+name+" location: "+location;
	}
}
class Student extends Person
{
	private String school;
	Student(String name,String school)
	{
		this(name,"beijing",school);
	}
	Student(String n,String l, String school)
	{
		super(n,l);
		this.school = school;
	}
	public String info()
	{
		return super.info()+" school: "+school;
	}
}
public class Test1
{
	public static void main(String[] args)
	{
		Person p1 =new Person("A");
		Person p2 =new Person("B","shanghai");
		Student s1 = new Student("C","S1");
		Student s2 = new Student("C","shanghai","S2");
		System.out.println(p1.info());
		System.out.println(p2.info());
		System.out.println(s1.info());
		System.out.println(s2.info());		
	}
}