import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner koko = new Scanner(System.in);
        int[] x = new int [3];
        int[] y = new int [3];
        for(int i=0; i<3; i++){
            x[i]=koko.nextInt();
            y[i]=koko.nextInt();
        }
        int[] dis = new int[3];
        int[] a = new int[3];
        for(int i=0; i<2; i++){
            a[i]=((x[i+1]-x[i])*(x[i+1]-x[i]))+((y[i+1]-y[i])*(y[i+1]-y[i]));
            dis[i]=a[i];
        }
        a[2]=((x[0]-x[2])*(x[0]-x[2]))+((y[0]-y[2])*(y[0]-y[2]));
        dis[2]=a[2];
        Arrays.sort(a);
        if(a[0]==a[1]&&a[0]+a[1]==a[2]){
            int xa=0;
            int ya=0;
            if(dis[0]>dis[1]){
                xa=x[0]+x[1]-x[2];
                ya=y[0]+y[1]-y[2];
            }else if(dis[0]==dis[1]){
                xa=x[2]+x[0]-x[1];
                ya=y[2]+y[0]-y[1];
            }else{
                xa=x[2]+x[1]-x[0];
                ya=y[2]+y[1]-y[0];
            }
            System.out.println(xa+" "+ya);
        }else{
            System.out.println(-1);
        }
    }
}