#include<iostream>
#include<cstdio>
using namespace std;
typedef double dbl;
dbl x[3], y[3], A, mx, my, ansx, ansy;
char c;

int main() {
	while (cin >> x[0] >> c >> y[0]) {
		for (int i = 1; i <= 2; i++) {
			cin >> c >> x[i] >> c >> y[i];
		}
		if (x[1] == x[0]) {
			ansx = (-1) * x[2];
			ansy = y[2];
		}
		else {
			A = (y[1] - y[0]) / (x[1] - x[0]);
			mx = (A*A*x[0] + x[2] + A*(y[2] - y[0])) / (A*A + 1);
			my = A*(mx - x[0]) + y[0];
			ansx = 2 * mx - x[2];
			ansy = 2 * my - y[2];
		}
		printf("%.6f %.6f\n", ansx, ansy);
	}
}
