a, b, c, d, e, f = map(int,input().split())
p1 = [a, b]
p2 = [c, d]
p3 = [e, f]

def f(x, y):
    z = ((y[0]-x[0])**2 + (y[1]-x[1])**2) ** 0.5
    return z

l = []
l.append([f(p1, p2), p1, p2])
l.append([f(p2, p3), p2, p3])
l.append([f(p1, p3), p1, p3])
l =sorted(l)

l1 = [f(p1, p2), f(p2, p3), f(p1, p3)]
l2 = sorted(set(l1))
if (l2[0]**2 + l2[0]**2) ** 0.5 == l2[1]:
    g = [(l[-1][1][0]+l[-1][2][0])/2, (l[-1][1][1]+l[-1][2][1])/2]
    L = [p1, p2, p3]
    L.remove(l[-1][1])
    L.remove(l[-1][2])
    print(int(2*g[0] - L[0][0]), int(2*g[1] - L[0][1]))
else:
    print(-1)