#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
// Yukicoder №55 正方形を描くだけの簡単なお仕事です。 ★★
// https://yukicoder.me/problems/no/55
// ***********************
#define PRINCR do{printf("\n");fflush(stdout);}while(0)
#define GETLINE(str) do{char *p;fgets(str,sizeof(str),stdin);p=strchr(str,'\n');if(p)*p='\0';}while(0)
#define REP(a,b) for(int a=0;a<(int)(b);++a)
static char *GETWORD(char* str) {char c;char *cp;cp=&str[0];c=fgetc(stdin);while( c != EOF ){if((c==' ')||( c=='\n')) break;*cp++=c;c=fgetc(stdin);}*cp='\0';return &str[0];}
#define	GETINTS(a,b) {char s[34];int *ap=a;REP(i,b){GETWORD(s);sscanf(s,"%d", ap);ap++;}}
static int GETLINEINT(void) {char s[34];GETLINE(s);return atoi(s);}
static int GETWORDINT(void) {char s[34];GETWORD(s);return atoi(s);}
#define SWAP(type,a,b) do{type _c;_c=a;a=b;b=_c;}while(0)
#define PI    ((double)3.141592653589793238462643383279)
typedef struct HOGE {
	int	x;
	int	y;
} SQUARE;

SQUARE PT[4];
double mySqrt(double x)
{
  double s,last;

  if(x<=0.0) return 0.0;

  if (x > 1) s = x;  else s = 1;
  do {
    last = s;
    s = (x / s + s) * 0.5;
  } while (s < last);

  return last;
}
int main() {
	double	ab,bc;

	REP(i,3) {
		PT[i].x = GETWORDINT();
		PT[i].y = GETWORDINT();
	}
	REP(k,3) {
		ab = (PT[0].x-PT[1].x) * (PT[0].x-PT[1].x);
		ab += (PT[0].y-PT[1].y) * (PT[0].y-PT[1].y);

		bc = (PT[1].x-PT[2].x) * (PT[1].x-PT[2].x);
		bc += (PT[1].y-PT[2].y) * (PT[1].y-PT[2].y);
		if( ab == bc ) {
			// 90度か？
			ab = atan2( PT[0].y - PT[1].y , PT[0].x - PT[1].x ) * 180. / PI + 1.;
            while( ab < 0 ) ab += 180.;
			bc = atan2( PT[2].y - PT[1].y , PT[2].x - PT[1].x ) * 180. / PI + 1.;
            while( bc < 0 ) bc += 180.;
			if( ab > bc ) SWAP(double,ab,bc);
			{
				int	cc;
				cc = ab;
				ab = cc;
				cc = bc;
				bc = cc;
			}
            bc = bc - ab -90;
			if( abs((int)bc) < 2 ) {
                ab = bc;
                break;
            }
			//printf( "%f:%f", ab, bc );
		}
		for(int i=2; i >= 0; --i ) {
				PT[i+1].x = PT[i].x;
				PT[i+1].y = PT[i].y;
		}
		PT[0].x = PT[3].x;
		PT[0].y = PT[3].y;
	}

	if( ab == bc ) {
		PT[3].x = PT[2].x + ( PT[0].x - PT[1].x );
		PT[3].y = PT[2].y + ( PT[0].y - PT[1].y );
		printf("%d %d\n", PT[3].x, PT[3].y );
	} else {
		printf("%d\n", -1 );
	}
	return 0;
}