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())

r = [xp2 - xp1, yp2 - yp1]

def a(p1,p2):
    s = (p1-xp1,p2-yp1)
    d = r[0] * s[0] + r[1] * s[1]
    a = xp1 + r[0] * d / (r[0]**2 + r[1]**2)
    b = yp1 + r[1] * d / (r[0]**2 + r[1]**2)
    return a,b

for i in range(q):
    x, y = map(int, input().split())
    x2,y2 = a(x, y)
    print(x + 2 * (x2 - x), y + 2 * (y2 - y))