x1, y1, x2, y2, x3, y3 = map(int, input().split())
X = [x1, x2, x3]
Y = [y1, y2, y3]
for i in range(3):
    r1 = [X[(i + 1) % 3] - X[i], Y[(i + 1) % 3] - Y[i]]
    r2 = [X[(i - 1) % 3] - X[i], Y[(i - 1) % 3] - Y[i]]
    if r1[0] * r2[0] + r1[1] * r2[1] == 0 and r1[0] ** 2 + r1[1] ** 2 == r2[0] ** 2 + r2[1] ** 2:
        print(X[i] + r1[0] + r2[0], Y[i] + r1[1] + r2[1])
        exit()
print(-1)