public class A

$\{$

private int a;

public A$($int a$)$

$\{$

$=$ a;

$\}$

$\}$

class B

$\{$

private int b;

public B$()$

$\{$

b $=25$;

$\}$

$\}$

class C

A

$\{$

private int c;

public C$()$

$\{$

$($

$)$;

c $=23$;

$\}$

$\}$

class Driver

$\{$

public static void main$($String$[]$ args$)$

$\{$

C c $=$ new C$()$;

$\}$

$\}$