X = [0] * 3
Y = [0] * 3

def func(x,y):

    for i in range(3):
        id1 = (i+1) % 3
        id2 = (i+2) % 3

        vx1 = x[id1] - x[i]
        vx2 = x[id2] - x[i]
        vy1 = y[id1] - y[i]
        vy2 = y[id2] - y[i]

        if vx1 ** 2 + vy1 ** 2 != vx2 ** 2 + vy2 ** 2:
            continue

        if vx1 * vx2 + vy1 * vy2 != 0:
            continue

        x4 = x[i] + vx1 + vx2
        y4 = y[i] + vy1 + vy2

        return True, x4, y4
    
    return False, 0, 0


X[0],Y[0],X[1],Y[1],X[2],Y[2] = map(int, input().split())

judge,x,y = func(X,Y)

if judge:
    print(x,y)
else:
    print(-1)