Problem:
Score : 200 points

Problem Statement

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.

Constraints

|x_1|,|y_1|,|x_2|,|y_2| \leq 100

(x_1,y_1) ≠ (x_2,y_2)

All values in input are integers.

Input

Input is given from Standard Input in the following format:

x_1 y_1 x_2 y_2

Output

Print x_3,y_3,x_4 and y_4 as integers, in this order.

Sample Input 1

0 0 0 1

Sample Output 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.

Sample Input 2

2 3 6 6

Sample Output 2

3 10 -1 7

Sample Input 3

31 -41 -59 26

Sample Output 3

-126 -64 -36 -131

Solution in C# (Mono 4.6.2.0) (judge verdict: Accepted)

using System;
using System.Linq;
using System.Collections.Generic;

namespace Algorithm
{
    class Program
    {
        static void Main(string[] args)
        {
            var line = Console.ReadLine().Split().Select(int.Parse).ToArray();
            int x1 = line[0], y1 = line[1], x2 = line[2], y2 = line[3];
            int x3 = 0, y3 = 0, x4 = 0, y4 = 0;

            var demX = Math.Abs(x2 - x1);
            var demY = Math.Abs(y2 - y1);

            if (x1 <= x2 && y1 >= y2)
            {
                x3 = x2 + demY;
                y3 = y2 + demX;
                x4 = x1 + demY;
                y4 = y1 + demX;
            }
            else if (x1 <= x2 && y1 <= y2)
            {
                x3 = x2 - demY;
                y3 = y2 + demX;
                x4 = x1 - demY;
                y4 = y1 + demX;
            }
            else if (x1 >= x2 && y1 >= y2)
            {
                x3 = x2 + demY;
                y3 = y2 - demX;
                x4 = x1 + demY;
                y4 = y1 - demX;
            }
            else if (x1 >= x2 && y1 <= y2)
            {
                x3 = x2 - demY;
                y3 = y2 - demX;
                x4 = x1 - demY;
                y4 = y1 - demX;
            }

            Console.WriteLine($"{x3} {y3} {x4} {y4}");
        }
    }
}