#include<bits/stdc++.h>
using namespace std;

int main()
{
	float x1,x2,y1,y2,x3,y3,x4,y4,ansx,ansy;
	
	while(cin>>x1>>y1)
	{
		cin>>x2>>y2>>x3>>y3>>x4>>y4;
		
		if(x1==x3 && y1==y3)
		{
			ansx = x2-x1+x4;
			ansy = y2-y1+y4;
		}
		
		else
		if(x2==x3 && y2==y3)
		{
			ansx = x1-x2+x4;
			ansy = y1-y2+y4;
		}
		else
		if(x1==x4 && y1==y4)
		{
			ansx = x2-x1+x3;
			ansy = y2-y1+y3;
		}
		
		else
		{
			ansx = x1-x2+x3;
			ansy = y1-y2+y3;
		}
		printf("%.3lf %.3lf\n", ansx, ansy);
	}
}

i dont know whats wrong with code , getting wrong answer. if anyone can point out some problem in the code. thank you in advance. Link to problem