#include <cstdio>
#include <vector>
#include <algorithm>
#include <cstring>
#include <string>
#include <cctype>
#include <sstream>
#include <cmath>
#include <climits>
#include <set>
#include <iostream>
#include <map>
#include <functional>
#include <cstdlib>
#include <numeric>
#include <queue>
#include <complex>

using namespace std;

#define reep(i,f,n) for(int i=f; i<int(n); ++i)
#define rep(i,n) reep(i,0,n)

typedef vector<int> vi;
typedef pair<int, int> pii;
typedef complex<double> Point;

double dot(Point a, Point b)
{
	return a.real()*b.real() + a.imag()*b.imag();
}

int main()
{
	Point a, b, c;
	while(scanf("%lf,%lf,%lf,%lf,%lf,%lf", &a.real(), &a.imag(), &b.real(), &b.imag(), &c.real(), &c.imag()) != EOF){
		Point d = 2.0*dot(c-a, b-a)/abs(b-a)/abs(b-a)*(b-a)-(c-a)+a;
		printf("%f %f\n", d.real(), d.imag());
	}
	return 0;
}