#include <iostream>
#include <string>
#include <cmath>

class VECTOR_INT_2D
{
	public:
	
	int x, y;
	
	VECTOR_INT_2D operator+(VECTOR_INT_2D vector)
	{
		VECTOR_INT_2D result;
		
		result.x = x + vector.x;
		result.y = y + vector.y;
		
		return result;
	}
	
	VECTOR_INT_2D operator-(VECTOR_INT_2D vector)
	{
		VECTOR_INT_2D result;
		
		result.x = x - vector.x;
		result.y = y - vector.y;
		
		return result;
	}
	
	void showVector(void)
	{
		std::cout << x << " " << y << std::endl;
		
		return;
	}
	
	int absx(void)
	{
		if(x >= 0)
		{
			return x;
		}
		else
		{
			return -1 * x;
		}
	}
	
	int absy(void)
	{
		if(y >= 0)
		{
			return y;
		}
		else
		{
			return -1 * y;
		}
	}
};

double inner(VECTOR_INT_2D vec1, VECTOR_INT_2D vec2)
{
	double inner;
	
	inner = vec1.x * vec2.x + vec1.y * vec2.y;

	return inner;
}

bool equal(VECTOR_INT_2D vec1, VECTOR_INT_2D vec2)
{
	if(vec1.x == vec2.x && vec1.y == vec2.y)
	{
		return true;
	}
	else
	{
		return false;
	}
}

bool equalNorm(VECTOR_INT_2D vec1, VECTOR_INT_2D vec2)
{
	if(vec1.absx() == vec2.absy() && vec1.absy() == vec2.absx())
	{
		return true;
	}
	else
	{
		return false;
	}
}

int main(void)
{
	VECTOR_INT_2D point[4];
	
	VECTOR_INT_2D RelVec[3];
	
	for(int i = 0; i < 3; i ++)
	{
		std::cin >> point[i].x >> point[i].y;
	}
	
	RelVec[0] = point[1] - point[0];
	RelVec[1] = point[2] - point[0];
	RelVec[2] = point[2] - point[1];
	
	if(inner(RelVec[0], RelVec[1]) == 0.0)
	{
		if(equalNorm(RelVec[0], RelVec[1]))
		{
			point[3] = point[0] + RelVec[0] + RelVec[1];
			
			point[3].showVector();
		}
		else
		{
			std::cout << "-1" << std::endl;
		}
	}
	else if(inner(RelVec[0], RelVec[2]) == 0.0)
	{
		if(equalNorm(RelVec[0], RelVec[2]))
		{
			point[3] = point[0] + RelVec[2];
			
			point[3].showVector();
		}
		else
		{
			std::cout << "-1" << std::endl;
		}
	}
	else if(inner(RelVec[1], RelVec[2]) == 0.0)
	{
		if(equalNorm(RelVec[1], RelVec[2]))
		{
			point[3] = point[2] - RelVec[1] - RelVec[2];
			
			point[3].showVector();
		}
		else
		{
			std::cout << "-1" << std::endl;
		}
	}
	else
	{
		std::cout << "-1" << std::endl;
	}
	
	return 0;
}