import numpy as np

x1,y1,x2,y2,x3,y3 = map(int, input().split())

d1 = np.array([x1, y1])
d2 = np.array([x2, y2])
d3 = np.array([x3, y3])

v1 = np.array([x1 - x2, y1 - y2])   
v2 = np.array([x2 - x3, y2 - y3])
v3 = np.array([x3 - x1, y3 - y1])

if np.dot(v1, v2) == 0 and np.dot(v1, v1) == np.dot(v2, v2):
	for i in [1, -1]:
		for j in [1, -1]:
			if all(d1 + i * v2 == d3 + j * v1):
				print((d1 + i * v2)[0], (d1 + i * v2)[1])

elif np.dot(v2, v3) == 0 and np.dot(v2, v2) == np.dot(v3, v3):
	for i in [1, -1]:
		for j in [1, -1]:
			if all(d2 + i * v3 == d1 + j * v2):
				print((d2 + i * v3)[0], (d2 + i * v3)[1])

elif np.dot(v1, v3) == 0 and np.dot(v1, v1) == np.dot(v3, v3):
	for i in [1, -1]:
		for j in [1, -1]:
			if all(d3 + i * v1 == d2 + j * v3):
				print((d3 + i * v1)[0],(d3 + i * v1)[1])
else:
	print(-1)