#include <iostream>
#include <cmath>
#include <cstdio>

using namespace std;

#define EPS 1e-6

int main(void){
  double x1,y1,x2,y2,xq,yq;
  double a,b,c,d;
  double X,Y;
  double retx, rety;
  while(cin >> x1){
	cin.ignore();
	cin >> y1; cin.ignore();
	cin >> x2; cin.ignore();
	cin >> y2; cin.ignore();
	cin >> xq; cin.ignore();
	cin >> yq;

	//calc ax+by+c=0
	X = x2 - x1;
	Y = y2 - y1;
	if(X == 0){
	  printf("%.6f %.6f\n", 2*x1-xq, y1);
	}else if(Y == 0){
	  printf("%.6f %.6f\n", x1, 2*y1-yq);
	}else{
	  a = Y / X;
	  b = y1 - (Y / X) * x1;

	  double theta;
	  theta = atan(a);
	  retx = xq * cos(2*theta) + yq * sin(2*theta) - b * sin(2*theta);
	  rety = xq * sin(2*theta) - yq * cos(2*theta) + b * cos(2*theta) + b;

	  if(fabs(retx) < EPS) retx = 0;
	  if(fabs(rety) < EPS) rety = 0;

	  printf("%.6f %.6f\n", retx, rety);
	}
  }
}