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:
def dot(a,b):
    return a[0]*b[0] + a[1]*b[1]

x1,y1,x2,y2 = [int(i) for i in input().split()] 
q = int(input())
for i in range(q):
    x,y = [int(i) for i in input().split()]
    a = [x2-x1,y2-y1]
    b = [x-x1,y-y1]
    co = dot(a,b) / dot(a,a)
    isec = [co*a[0]+x1,co*a[1]+y1]
    c = [isec[0] - x, isec[1] - y]
    print(isec[0]+c[0],isec[1]+c[1])