def dist(x1, y1, x2, y2):
    return (x1-x2)**2 + (y1-y2)**2

def solve(x1, y1, x2, y2, x3, y3):
    if is_valid(x1, y1, x2, y2, x3, y3):
        return get_pos(x1, y1, x2, y2, x3, y3)
    return [-1]

def is_valid(x1, y1, x2, y2, x3, y3):
    x12 = x2 - x1
    y12 = y2 - y1
    x13 = x3 - x1
    y13 = y3 - y1
    return x12 * x13 + y12 * y13 == 0
    
def get_pos(x1, y1, x2, y2, x3, y3):
    return x2 + x3 - x1, y2 + y3 - y1

x1, y1, x2, y2, x3, y3 = map(int, input().split())
dist12 = dist(x1, y1, x2, y2)
dist13 = dist(x1, y1, x3, y3)
dist23 = dist(x2, y2, x3, y3)

if dist12 == dist13:
    print(*solve(x1, y1, x2, y2, x3, y3))
elif dist12 == dist23:
    print(*solve(x2, y2, x1, y1, x3, y3))
elif dist13 == dist23:
    print(*solve(x3, y3, x1, y1, x2, y2))
else:
    print(-1)