abstract class Person
{
private String name;
private int age;
public abstract void sleep();
}
abstract class Player extends Person
{
public abstract void play();
}
abstract class Teacher extends Person
{
public abstract void teach();
}
class PPlayer extends Player implements English
{
public  void sleep(){
  System.out.println("边打乒乓球边睡");
}
public  void play(){
  System.out.println("打乒乓球");
}
public  void study(){
  System.out.println("学英语");
}
}
class Lplayer extends Player
{
public  void sleep(){
  System.out.println("边打lan球边睡");
}
public  void play(){
  System.out.println("打lan球");
}
}
class PPteacher extends Teacher implements English
{
public void sleep(){
  System.out.println("边打乒乓球边睡");
}
public  void teach(){
  System.out.println("jiao");
}
public void study(){
  System.out.println("学英语");
}
}
class Lteacher extends Teacher
{
public void sleep(){
  System.out.println("边打LAN球边睡");
}
public  void teach(){
  System.out.println("jiao");
}
}
interface English
{
public abstract void study();
}
class Dome3
{
public static void main(String[] args)
{
  PPlayer p= new PPlayer();
  p.sleep();
  p.play();
  p.study();
}
}

abstract class Person
{
private String name;
private int age;
public abstract void sleep();
}
abstract class Player extends Person
{
public abstract void play();
}
abstract class Teacher extends Person
{
public abstract void teach();
}
class PPlayer extends Player implements English
{
public  void sleep(){
  System.out.println("边打乒乓球边睡");
}
public  void play(){
  System.out.println("打乒乓球");
}
public  void study(){
  System.out.println("学英语");
}
}
class Lplayer extends Player
{
public  void sleep(){
  System.out.println("边打lan球边睡");
}
public  void play(){
  System.out.println("打lan球");
}
}
class PPteacher extends Teacher implements English
{
public void sleep(){
  System.out.println("边打乒乓球边睡");
}
public  void teach(){
  System.out.println("jiao");
}
public void study(){
  System.out.println("学英语");
}
}
class Lteacher extends Teacher
{
public void sleep(){
  System.out.println("边打LAN球边睡");
}
public  void teach(){
  System.out.println("jiao");
}
}
interface English
{
public abstract void study();
}
class Dome3
{
public static void main(String[] args)
{
  PPlayer p= new PPlayer();
  p.sleep();
  p.play();
  p.study();
}
}