Problem: For given three points p1, p2, p, find the reflection point x of p onto p1p2.

<image>

Constraints

* 1 ≤ q ≤ 1000
* -10000 ≤ xi, yi ≤ 10000
* p1 and p2 are not identical.

Input


xp1 yp1 xp2 yp2
q
xp0 yp0
xp1 yp1
...
xpq−1 ypq−1


In the first line, integer coordinates of p1 and p2 are given. Then, q queries are given for integer coordinates of p.

Output

For each query, print the coordinate of the reflection point x. The output values should be in a decimal fraction with an error less than 0.00000001.

Examples

Input

0 0 2 0
3
-1 1
0 1
1 1


Output

-1.0000000000 -1.0000000000
0.0000000000 -1.0000000000
1.0000000000 -1.0000000000


Input

0 0 3 4
3
2 5
1 4
0 3


Output

4.2400000000 3.3200000000
3.5600000000 2.0800000000
2.8800000000 0.8400000000

Solution (in PYTHON3):

Solution:
if __name__ == "__main__":
    x_p1, y_p1, x_p2, y_p2 = map(lambda x: int(x), input().split())
    q = int(input())

    p1p2 = (x_p2 - x_p1, y_p2 - y_p1)
    for _ in range(q):
        x_p0, y_p0 = map(lambda x: int(x), input().split())
        p1p0 = (x_p0 - x_p1, y_p0 - y_p1)
        r = (p1p2[0] * p1p0[0] + p1p2[1] * p1p0[1]) / (p1p2[0] ** 2 + p1p2[1] ** 2)
        proj_p = (x_p1 + p1p2[0] * r, y_p1 + p1p2[1] * r)
        proj_v = (proj_p[0] - x_p0, proj_p[1] - y_p0)
        print(x_p0 + 2 * proj_v[0], y_p0 + 2 * proj_v[1])