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

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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:
xp1, yp1, xp2, yp2 = map(int, input().split())
q = int(input())

xp = complex(xp2- xp1, yp2 - yp1)

for _ in range(q):
    x, y = map(int, input().split())
    xpi = complex(x - xp1, y - yp1)
    dot = xp.real * xpi.real + xp.imag * xpi.imag
    v1 = dot * xp / (abs(xp) ** 2)
    v2 = v1 - xpi
    ans = complex(x, y) + v2 * 2
    print("{:.9f} {:.9f}".format(ans.real, ans.imag))