#include<iostream>
#include<cstdio>
using namespace std;
int main(){
  double a[2],b[2],c[2],ans[2];
  for(;;){
    if(scanf("%lf,%lf,%lf,%lf,%lf,%lf",&a[0],&a[1],&b[0],&b[1],&c[0],&c[1]) == EOF) break;
    if(a[0] == b[0]) printf("%.6lf %.6lf\n",-c[0],c[1]);
    else{
      double x = (a[1]-b[1])/(a[0]-b[0]);
      c[0]-=a[0];
      c[1]-=a[1];
      ans[0] = c[0]*(1-x*x)/(x*x+1)+c[1]*2*x/(x*x+1);
      ans[1] = c[0]*2*x/(x*x+1)+c[1]*(x*x-1)/(x*x+1);
      printf("%.6lf %.6lf\n",ans[0]+a[0],ans[1]+a[1]);
    }
  }
  return 0;
}