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:
#  http://judge.u-aizu.ac.jp/onlinejudge/description.jsp?id=CGL_1_B
#   : python3
#  2018.12.10 yonezawa

#from collections import deque
import sys
input = sys.stdin.readline
#import cProfile
from math import cos,sin,radians,sqrt

def Reflection(p1,p2):
    (x,y) = p2
    (tx,ty) = Projection(p1,(x,y))
    rx = (tx - x) * 2 + x 
    ry = (ty - y) * 2 + y
    return (rx,ry)


def Projection(p1,p2):
    (x1,y1,x2,y2) = p1
    if (x1*x1+y1*y1 > x2*x2 + y2*y2):
        (x1,y1,x2,y2) = (x2,y2,x1,y1)
    (x3,y3) = p2

    tx = x2 -x1
    ty = y2 -y1
    l = sqrt(tx*tx+ty*ty)

    nx = tx / l
    ny = ty / l
    pl = nx * (x3 - x1)  + ny * (y3 - y1)
    return (nx * pl + x1, ny * pl + y1 )


def main():
    (x1,y1,x2,y2) = map(int,input().split())
    for i in range(int(input())):
        (x3,y3) = map(int,input().split())
        print('{:.10f} {:.10f}'.format(*Reflection((x1,y1,x2,y2),(x3,y3))))

    
if __name__ == '__main__':
    main()
    #pr = cProfile.Profile()
    #pr.runcall(main)
    #pr.print_stats()