class PencilCase
    {
        //variables
        int pencils;
        int pens;

        //c'tor
        public PencilCase(int a,int b)
        {
            pencils = a;
            pens = b;
        }

        //set functions
        public void AddPencil()
        {
            pencils++;
        }

        public void SubPencil()
        {
            pencils--;
        }

        public void AddPen()
        {
            pens++;
        }

        public void SubPen()
        {
            pens--;
        }

        //get functions
        public int GetPencil()
        {
            return pencils;
        }

        public int GetPen()
        {
            return pens;
        }

    }