#正方形を描くだけの簡単なお仕事です
#未完成

def d(d1 , d2):
    r = (d1[0] - d2[0]) ** 2 + (d1[1] - d2[1]) ** 2
    return r

xy = list(map(int , input().split()))
p1 = [xy[0] , xy[1]]
p2 = [xy[2] , xy[3]]
p3 = [xy[4] , xy[5]]

r1 = d(p1 , p2)
r2 = d(p2 , p3)
r3 = d(p3 , p1)

R = [r1 , r2 , r3]
R.sort()

if R[0] == R[1] and R[2] == R[0] + R[1]:
    x = 0
    y = 0
    if r1 == R[2]:
        x = p1[0] + (p2[0] - p3[0])
        y = p1[1] + (p2[1] - p3[1])
    elif r2 == R[2]:
        x = p2[0] + (p3[0] - p1[0])
        y = p2[1] + (p3[1] - p1[1])
    else:
        x = p3[0] + (p1[0] - p2[0])
        y = p3[1] + (p1[1] - p2[1])
    print(x , y)
else:
    print(-1)