#include<iostream.h>

class A{

public:

    A(int i=0){a=i;}

    void print(){cout<<A<<',';}

private:

    int a;

}; class B:public A{

public:

    B(){b1=b2=0;}

    B(int i){b1=i;b2=0;}

    B(int i,int j,int k):A(i),b1(j),b2(k){}

    void print(){A::print();cout<<B1<<','<<B2<<endl;}

private:

    int b1,b2;

};

void main(){

 B d1,d2(5),d3(4,5,6);

 d1.print();d2.print();d3.print();

}