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();
        }
        int c=check(x,y,0);
        if(c==-1){
            System.out.println(-1);
        }else{
            int x4=point(x,c);
            int y4=point(y,c);
            System.out.println(x4+" "+y4);
        }
    }
    static int check(int[]x, int[]y,int z){
        if(z==3){
            return -1;
        }
        int ax = x[z%3]-x[(z+1)%3];
        int bx = x[(z+2)%3]-x[(z+1)%3];
        int cx = x[z%3]-x[(z+2)%3];
        int ay = y[z%3]-y[(z+1)%3];
        int by = y[(z+2)%3]-y[(z+1)%3];
        int cy = y[z%3]-y[(z+2)%3];
        int d1 = ax*ax+ay*ay;
        int d2 = bx*bx+by*by;
        int d3 = cx*cx+cy*cy;
        if(d1==d2&&d1+d2==d3){
            return z;
        }else{
            return check(x,y,z+1);
        }
    }
    static int point(int[]A,int B){
        int n = A[(B+2)%3]-A[(B+1)%3];
        int r = A[B%3]+n;
        return r;
    }
}