#include<cstdio>


class pos_t
{
public:
	int x, y;
	bool operator==(pos_t& rhs)
	{
		return (x==rhs.x && y==rhs.y);
	}
	pos_t operator+(pos_t& rhs)
	{
		pos_t ret;
		ret.x=x+rhs.x;
		ret.y=y+rhs.y;
		return ret;
	}
	pos_t operator-(pos_t& rhs)
	{
		pos_t ret;
		ret.x=x-rhs.x;
		ret.y=y-rhs.y;
		return ret;
	}
	void print(void)
	{
		printf("%d %d\n", x, y);
	}
};


int main(void)
{
	pos_t p[2], o, a, b;
	int i;

	while(scanf("%d%d", &o.x, &o.y)==2)
	{
		for(i=0;i<2;i++)
		{
			scanf("%d%d", &p[i].x, &p[i].y);
			p[i]=p[i]-o;
		}
		a=p[0];
		b=p[1];
		if((a.x==b.y && a.y==-b.x) || (a.x==-b.y && a.y==b.x))
		{
			(a+b+o).print();
			continue;
		}

		a=p[0]-p[1];
		b=p[1];
		if((a.x==b.y && a.y==-b.x) || (a.x==-b.y && a.y==b.x))
		{
			(a+o).print();
			continue;
		}
		a=p[1]-p[0];
		b=p[0];
		if((a.x==b.y && a.y==-b.x) || (a.x==-b.y && a.y==b.x))
		{
			(a+o).print();
			continue;
		}
		printf("-1\n");
	}

	return 0;
}