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

int main(){
	double x1,y1,x2,y2,x3,y3,xq,yq;
	while(~scanf("%lf,%lf,%lf,%lf,%lf,%lf",&x1,&y1,&x2,&y2,&x3,&y3,&xq,&yq)){
		double X,Y,x,y;
		if(fabs(x2-x1)<1e-9){
			 printf("%.6lf %.6lf\n",x2-(x3-x2),y3);
		}
		else if(fabs(y2-y1)<1e-9){
			printf("%.6lf %.6lf\n",x3,y2-(y3-y2));
		}
		else{
			X=(y2-y1)/(x2-x1);
			Y=y1-x1*X;
			x=(2*y3*X-2*X*Y+x3-X*X*x3)/(X*X+1);
			y=(x3-x)/X+y3;
			printf("%.6lf %.6lf\n",x,y);
		}
	}
}