def func(x,y,x1,y1,x2,y2):
    v1x = x1-x
    v1y = y1-y
    v2x = x2-x
    v2y = y2-y
    if v1x**2 + v1y**2 == v2x**2 + v2y**2 and v1x * v2x + v1y * v2y == 0:
        return (x+v1x+v2x, y+v1y+v2y)
    else:
        return -1

x1,y1,x2,y2,x3,y3 = map(int, raw_input().split())
t = func(x1,y1,x2,y2,x3,y3)
u = func(x2,y2,x1,y1,x3,y3)
v = func(x3,y3,x1,y1,x2,y2)
if t != -1:
    print t[0],t[1]
elif u != -1:
    print u[0],u[1]
elif v != -1:
    print v[0],v[1]
else:
    print -1