from itertools import permutations

def check(p1, p2, p3):
    x1, y1 = p1
    x2, y2 = p2
    x3, y3 = p3
    if (x1 - x2) ** 2 + (y1 - y2) ** 2 == (x3 - x2) ** 2 + (y3 - y2) ** 2 and (x1 - x2) * (x3 - x2) + (y1 - y2) * (y3 - y2) == 0:
        return x1 + x3 - x2, y1 + y3 - y2
    else:
        return None

def func(x, y):
    if x is None and y is None:
        return None
    elif x is None:
        return y
    else:
        return x

x1, y1, x2, y2, x3, y3 = map(int, input().split())
p = None
for perm in permutations([(x1, y1), (x2, y2), (x3, y3)]):
    p = func(p, check(*perm))
if p is not None:
    print(p[0], p[1])
else:
    print(-1)