#include <iostream>
#include <cstdio>
using namespace std;

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

typedef Point Vector;

double norm(Vector v){
  return v.x*v.x + v.y*v.y;
}

struct Segment{
  Point p1,p2;
};

double dot(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 = dot(p - s.p1, base)/norm(base);
  return s.p1 + base*t;
}

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

int main(){
  Segment p;
  Point q,r;

  while(scanf("%lf,%lf,%lf,%lf,%lf,%lf", &p.p1.x, &p.p1.y, &p.p2.x, &p.p2.y, &q.x, &q.y) != EOF){

    r = reflect(p,q);
    
    printf("%f %f\n",r.x,r.y);
  }
}