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

typedef complex<double> P;

double cross(P a, P b){
	return (a.real() * b.imag() - a.imag() * b.real());
}

double distance_l_p(P a, P b, P c){
	return abs(cross(b-a, c-a)) / abs(b-a);
}

P symmetric_point(P a, P b, P c){
	P un1 = ((b-a) * P(0, 1)) / abs(b-a);
	P un2 = ((b-a) * P(0,-1)) / abs(b-a);

	if(cross(b-a, c-a) > 0){
		return c - 2 * distance_l_p(a,b,c) * un1;
	}
	else{
		return c - 2 * distance_l_p(a,b,c) * un2;
	}
}

int main(void){
	P p[3],d;
	double x,y;

	while(1){
		for(int i=0;i<3;i++){
			if(scanf("%lf,%lf",&x,&y) == EOF) return 0;
			if(i != 2) getchar();
			p[i] = P(x,y);
		}
		d = symmetric_point(p[0],p[1],p[2]);
		printf("%.6lf %.6lf\n",d.real(),d.imag());
	}
}