#include<iostream>
#include<cstdio>
using namespace std;
int main(){
	char c; 
	double X,Y,x1,x2,y1,y2,xp,yp,a,b;
	while(cin>>x1>>c>>y1>>c>>x2>>c>>y2>>c>>xp>>c>>yp){
		if(y1==y2){
			a=xp;
			if(yp>y1)
				b=y1-(yp-y1);
			else
				b=2*y1-yp;
		}
		else if(x1==x2){
			b=yp;
			if(xp>x1)
				a=x1-(xp-x1);
			else
				a=2*x1-xp;
			
		}
		else{
			X=x2-x1;
			Y=y2-y1;
			b=(Y*Y*yp+2*xp*X*Y-2*x1*X*Y+2*y1*X*X-yp*X*X)/(X*X+Y*Y);
			a=Y*(yp-b)/X+xp;
		}
		printf("%.6lf %.6lf\n",a,b);
	}
	return 0;
}