def d(x1,y1,x2,y2):
	return pow((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2),0.5)
x1,y1,x2,y2,x3,y3 = map(int,input().split())
x,y = [x1,x2,x3],[y1,y2,y3]
ansx,ansy = -1,-1
for i in range(3):
	for j in range(3):
		if i == j:
			continue
		for k in range(3):
			if i == k or j == k:
				continue
			ax = x[i] + (x[j] - x[i]) + (x[k] - x[i])
			ay = y[i] + (y[j] - y[i]) + (y[k] - y[i])

			if d(x[i],y[i],x[j],y[j]) == d(x[i],y[i],x[k],y[k]) == d(ax,ay,x[j],y[j]) == d(ax,ay,x[k],y[k]):
				ansx,ansy = ax,ay
if ansx != -1:
	print(ansx,ansy)
else:
	print(-1)