x1, y1, x2, y2, x3, y3 = map(int, input().split())

x4 = x3 + (x1 - x2)
y4 = y3 + (y1 - y2)

if (x4 - x2)*(x3 - x1) + (y4 - y2)*(y3 - y1) == 0:
    exit(print(x4, y4))

x4 = x2 + (x3 - x1)
y4 = y2 + (y3 - y1)

if (x4 - x1)*(x3 - x2) + (y4 - y1)*(y3 - y2) == 0:
    exit(print(x4, y4))

x4 = x1 + (x2 - x3)
y4 = y1 + (y2 - y3)

if (x3 - x4)*(x2 - x1) + (y3 - y4)*(y2 - y1) == 0:
    exit(print(x4, y4))

print(-1)