uva 10242

#include<bits/stdc++.h>
using namespace std;

struct point{
    double x;
    double y;
};

void func(double x1,double x2,double x3,double y1,double y2,double y3){
    cout<<fixed<<setprecision(3)<<(x1+x2)-x3<<" "<<(y1+y2)-y3<<endl;
}
int main()
{
    point a,b,c,d;
    while(scanf("%lf%lf%lf%lf%lf%lf%lf%lf",&a.x,&a.y,&b.x,&b.y,&c.x,&c.y,&d.x,&d.y) == 8){
        if(a.x == b.x && a.x == b.y){
            func(c.x,d.x,a.x,c.y,d.y,a.y);
        }
        else if(a.x == c.x && a.y == c.y){
            func(b.x,d.x,a.x,b.y,d.y,a.y);
        }
        else if(a.x == d.x && a.y == d.y){
            func(b.x,c.x,a.x,b.y,c.y,a.y);
        }
        else if(b.x == c.x && b.y == c.y){
            func(a.x,d.x,b.x,a.y,d.y,b.y);
        }
        else if(b.x == d.x && b.y == d.y){
            func(a.x,c.x,b.x,a.y,c.y,b.y);
        }
        else{
            func(a.x,b.x,c.x,a.y,b.y,c.y);
        }
    }
   // cout<<a.x<<" "<<a.y<<endl;
    return 0;
}