#include <iostream>
    using namespace std;
    class BaseClass 
    {
        int A;
        public:
        void setA(int num1) 
        {
            A = num1;
        }
        void showA() 
        {
            cout << A <<" ";
        }
    };
    class DerivedClass : private BaseClass
    {
        int B;
        public:
        void setAB(int num1, int num2)
        {
            setA(num1);      
            B = num2;
        }
        void showAB() 
        {
            showA();       
            cout << B << '\n';
        }
    };
    int main()
    {
        DerivedClass object;
        object.setAB(15, 25);
        object.showAB();
        return 0;
    }