content: package v102;
  
  import java.io.BufferedReader;
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.InputStreamReader;
  import java.io.PrintWriter;
  import java.util.StringTokenizer;
  
  public class TheOtherTwoTrees_UVa10250 {
  
  	static final double EPS = 1e-9;
  	
  	public static void main(String[] args) throws IOException {
  		
  		Scanner sc = new Scanner(System.in);
  		PrintWriter out = new PrintWriter(System.out);
  		
  		while(sc.ready())
  		{
  			Point p = new Point(sc.nextDouble(), sc.nextDouble()), q = new Point(sc.nextDouble(), sc.nextDouble());
  			
  			Point r = p.midPoint(q);
  			Vector v = new Vector(p, q);
  			v.rotate90();
  			
  			Point s = r.translate(v.scale(0.5));
  			v.reverse();
  			Point t = r.translate(v.scale(0.5));
  			
  			out.printf("%.10f %.10f %.10f %.10f\n", t.x, t.y, s.x, s.y);
  		}
  		out.flush();
  	}
  	
  	static class Point
  	{
  		double x, y;
  		
  		Point(double a, double b) { x = a; y = b; }
  		
  		Point translate(Vector v) { return new Point(x + v.x, y + v.y); }
  		
  		double dist(Point p) { return Math.sqrt((x - p.x) * (x - p.x) + (y - p.y) * (y - p.y)); }
  		
  		Point midPoint(Point p) { return new Point((x + p.x) / 2.0, (y + p.y) / 2.0); }
  	}
  	
  	static class Vector
  	{
  		double x,y;
  		
  		Vector(double a, double b) { x = a; y = b; }
  		
  		Vector(Point p, Point q) { x = q.x - p.x; y = q.y - p.y; }
  		
  		double norm2() { return x * x + y * y; }
  		
  		Vector scale(double s) { return new Vector(x * s, y * s); }
  		
  		void rotate90()
  		{
  			double tmp = x;
  			x = -y;
  			y = tmp;
  		}
  		
  		void reverse()
  		{
  			x *= -1;
  			y *= -1;
  		}
  	}
  	static class Scanner 
  	{
  		StringTokenizer st;
  		BufferedReader br;
  
  		public Scanner(InputStream s){	br = new BufferedReader(new InputStreamReader(s));}
  
  		public String next() throws IOException 
  		{
  			while (st == null || !st.hasMoreTokens()) 
  				st = new StringTokenizer(br.readLine());
  			return st.nextToken();
  		}
  
  		public int nextInt() throws IOException {return Integer.parseInt(next());}
  		
  		public long nextLong() throws IOException {return Long.parseLong(next());}
  
  		public String nextLine() throws IOException {return br.readLine();}
  		
  		public double nextDouble() throws IOException
  		{
  			String x = next();
  			StringBuilder sb = new StringBuilder("0");
  			double res = 0, f = 1;
  			boolean dec = false, neg = false;
  			int start = 0;
  			if(x.charAt(0) == '-')
  			{
  				neg = true;
  				start++;
  			}
  			for(int i = start; i < x.length(); i++)
  				if(x.charAt(i) == '.')
  				{
  					res = Integer.parseInt(sb.toString());
  					sb = new StringBuilder("0");
  					dec = true;
  				}
  				else
  				{
  					sb.append(x.charAt(i));
  					if(dec)
  						f *= 10;
  				}
  			res += Integer.parseInt(sb.toString()) / f;
  			return res * (neg?-1:1);
  		}
  		
  		public boolean ready() throws IOException {return br.ready();}
  
  
  	}
  }
  