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: Wrong Answer)

using System;
using System.Linq;

namespace atcoder
{
    public class atcoder
    {
        public static void Main()
        {
            int[] input = Console.ReadLine().Split().Select(x => int.Parse(x)).ToArray();
            int x1 = input[0], y1 = input[1], x2 = input[2], y2 = input[3];
            int n = Math.Abs(x1 - x2),m = Math.Abs(y1 - y2);
            if (x1 < x2 && y1 < y2) 
            {
                int x3 = x2 - m, y3 = y2 + n;
                Console.WriteLine($"{x3} {y3} {x3 - n} {y3 - m}");
            } else if (x1 > x2 && y1 < y2)
            {
                int x3 = x2 - m, y3 = y2 - n;
                Console.WriteLine($"{x3} {y3} {x3 + n} {y3 - m}");
            } else if (x1 > x2 && y1 > y2)
            {
                int x3 = x2 + m, y3 = y2 - n;
                Console.WriteLine($"{x3} {y3} {x3 + n} {y3 + m}");
            }  else if (x1 < x2 && y1 > y2)
            {
                int x3 = x2 - m, y3 = y2 - n;
                Console.WriteLine($"{x3} {y3} {x3 + m} {y3 - n}");
            }  else if (x1 == x2 && y1 < y2)
            {
                int x3 = x2 - m, y3 = y2;
                Console.WriteLine($"{x3} {y3} {x3} {y3 - m}");
            } else if (x1 == x2 && y1 > y2)
            {
                int x3 = x2 + m, y3 = y2;
                Console.WriteLine($"{x3} {y3} {x3} {y3 + m}");
            } else if (x1 < x2 && y1 == y2)
            {
                int x3 = x2, y3 = y2 + n;
                Console.WriteLine($"{x3} {y3} {x3 - n} {y3}");
            } else if (x1 > x2 && y1 == y2)
            {
                int x3 = x2, y3 = y2 - n;
                Console.WriteLine($"{x3} {y3} {x3 + n} {y3}");
            }


        }
    }
}