Score : 200 points
There is a square in the xy-plane. The coordinates of its four vertices are (x_1,y_1),(x_2,y_2),(x_3,y_3) and (x_4,y_4) in counter-clockwise order. (Assume that the positive x-axis points right, and the positive y-axis points up.)
Takahashi remembers (x_1,y_1) and (x_2,y_2), but he has forgot (x_3,y_3) and (x_4,y_4).
Given x_1,x_2,y_1,y_2, restore x_3,y_3,x_4,y_4. It can be shown that x_3,y_3,x_4 and y_4 uniquely exist and have integer values.
Input is given from Standard Input in the following format:
x_1 y_1 x_2 y_2
Print x_3,y_3,x_4 and y_4 as integers, in this order.
0 0 0 1
-1 1 -1 0
(0,0),(0,1),(-1,1),(-1,0) is the four vertices of a square in counter-clockwise order. Note that (x_3,y_3)=(1,1),(x_4,y_4)=(1,0) is not accepted, as the vertices are in clockwise order.
2 3 6 6
3 10 -1 7
31 -41 -59 26
-126 -64 -36 -131