#include <iostream>
using namespace std;


class Point {
public:
  double x, y;
  Point(double x = 0, double y = 0):x(x), y(y){}
  Point operator +(Point p) { return Point(x+p.x, y+p.y);}
  Point operator -(Point p) { return Point(x-p.x, y-p.y);}
  Point operator *(double t) { return Point(x*t, y*t);}
};

struct Segment{
  Point p1, p2;
};

  Segment s;
  Point p,ans;

typedef Point Vector;

double norm(double x, double y){
  return x*x + y*y;
}

double gaiseki(Vector a, Vector b) {
  return a.x*b.y - a.y*b.x;
}

double naiseki(Vector a, Vector b) {
  return a.x*b.x + a.y*b.y;
}

Point project(Segment s, Point p){
  Vector base = s.p2 - s.p1;
  double t = naiseki(p - s.p1, base)/norm(base.x, base.y);
  return s.p1 + base*t;
}

Point reflect (Segment s, Point p){
  return p + (project(s, p) - p)*2.0;
}

int main(){
 
  int i;
  double x1,x2,y1,y2,xq,yq;

  while(scanf("%lf,%lf,%lf,%lf,%lf,%lf",&x1, &y1 ,&x2, &y2, &xq,&yq)!=EOF){

    s.p1 = Point(x1,y1);
    s.p2 = Point(x2,y2);
    p = Point(xq,yq);

    ans  = reflect(s,p);

    printf("%.6f %.6f\n", ans.x, ans.y);
  }
  return 0;
}