class data
{
private:
    int a,b,c,d;
public:
    data(){
        a=b=c=d=0;
    }


data(int aa,int bb, int cc, int dd)
    {
        a=aa,b=bb,c=cc,d=dd;
    }
    int get_b(){return b;}
    int get_a(){return a;}
};