import java.util.*;

public class Main {
	
	public static void main(String[] args) {
		Scanner sc=new Scanner(System.in);
		int x[]=new int[3];
		int y[]=new int[3];
		for(int i=0;i<3;i++){
			x[i]=sc.nextInt();
			y[i]=sc.nextInt();
		}
		for(int i=0;i<3;i++){
			int x1=x[i%3];
			int y1=y[i%3];
			int x2=x[(i+1)%3];
			int y2=y[(i+1)%3];
			int x3=x[(i+2)%3];
			int y3=y[(i+2)%3];
		if((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2)==(x2-x3)*(x2-x3)+(y2-y3)*(y2-y3)){
			if((x1-x2)*(x2-x3)+(y1-y2)*(y2-y3)==0){
				int ansx=x3+x1-x2;
				int ansy=y3+y1-y2;
				System.out.println(ansx+" "+ansy);
				return;
			}
		}
		
		
	}
		System.out.println(-1);}
}