class A
{public:	   int  apu;
 protected:  int  apr;
 private:	   int  aprv;
};
class B : public A
{public:	
	void fb()
	{apr = 123; 
	 aprv = 543;
	};
};
class C : protected  A
{public:	
	void fc()
	{apr = 253; 
	 aprv = 53;
	};
};
class D : private  A
{protected: void fd()
	{apu = 123;
	 apr = 253; 
	 aprv = 53;
	};
};
class E : public  B
{public: void fe()
	{ apr = 253; 
	  aprv = 53;
	};
};
class F : public  C
{public: void ff()
	{apr = 253; 
	 aprv = 53;
	};
};
void main()
{
A a1; 
B b1; 
C c1; 
D d1; 
E e1;
F f1; 
int i, j, k, l, m, n, p;
i = a1.apu;
j =b1.apr;
k  =c1.apu;
c1.fb();
d1.fd();
m = e1.apu;
n = f1.aprv;
f1.ff();
}