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:
x0,y0,x1,y1 = map(float,input().split())
n = int(input())
vx1,vy1 = x1-x0,y1-y0

for i in range(n):
    x2,y2 = map(float,input().split())
    vx2,vy2 = x2-x0,y2-y0
    sqr = vx1**2 + vy1**2
    in_p = vx1*vx2 + vy1*vy2
    xt,yt = 2*in_p*vx1/sqr + 2*x0-x2,2*in_p*vy1/sqr + 2*y0-y2
    print("{0:.10f} {1:.10f}".format(xt,yt))