#include <iostream>

using namespace std;

int main() {
  double x1, y1, x2, y2, xq, yq;
  while (scanf("%lf,%lf,%lf,%lf,%lf,%lf", &x1, &y1, &x2, &y2, &xq, &yq) != EOF) {
    double x2d = x2 - x1;
    double y2d = y2 - y1;
    double xqd = xq - x1;
    double yqd = yq - y1;
    double alpha = (x2d * xqd + y2d * yqd) / (x2d * x2d + y2d * y2d);
    double xans = alpha * x2d - (xqd - alpha * x2d) + x1;
    double yans = alpha * y2d - (yqd - alpha * y2d) + y1;
    printf("%.6lf %.6lf\n", xans, yans);
  }
}
