x1, y1, x2, y2, x3, y3 = map(int, input().split())
ux, uy = x2 - x1, y2 - y1
vx, vy = x3 - x1, y3 - y1
if ux**2 + uy**2 == vx**2 + vy**2 and ux * vx + uy * vy == 0:
    print(x1 + ux + vx, y1 + uy + vy)
    exit()
ux, uy = x1 - x2, y1 - y2
vx, vy = x3 - x2, y3 - y2
if ux**2 + uy**2 == vx**2 + vy**2 and ux * vx + uy * vy == 0:
    print(x2 + ux + vx, y2 + uy + vy)
    exit()
ux, uy = x1 - x3, y1 - y3
vx, vy = x2 - x3, y2 - y3
if ux**2 + uy**2 == vx**2 + vy**2 and ux * vx + uy * vy == 0:
    print(x3 + ux + vx, y3 + uy + vy)
    exit()
print(-1)