import java.util.Scanner;

public class Main {
public static void main(String[] args) {
Scanner scan = new Scanner(System.in);

int count = scan.nextInt();
int x1=0, x2=0, x3=0, y1=0, y2=0, y3=0;

for(int i=0; i<count; i++){
        x1 = scan.nextInt();
        y1 = scan.nextInt();
        x2 = scan.nextInt();
        y2 = scan.nextInt();
        x3 = scan.nextInt();
        y3 = scan.nextInt();

        if(x1 == x2){
            if(y1==y3)
                System.out.println(x3+" "+(y3+(y2-y1)));
            else
                System.out.println(x3+" "+(y3-(y2-y1)));
        }
        else if(x1 == x3){
            if(y1==y2)
                System.out.println((x3+(x2-x1))+" "+y3);
            else
                System.out.println((x3-(x2-x1))+" "+y3);
        }
        else{
            if(y1==y2)
                System.out.println(x1+" "+(y1+(y3-y2)));
            else
                System.out.println(x1+" "+(y1-(y3-y2)));
        }   
    }

}

}

약간 코드를 중복으로 구현한 느낌이 있긴 한데.....
왜 오답으로 나오는지를 모르겠습니다 ㅠㅠ