#include <stdio.h>
#include <stdlib.h>

static int p[4][2];
static int c[2];

void sum(int a, int b);
int right(void);

int main(void) {
    int o;
    for (int i = 0; i < 3; i++) {
        for (int j = 0; j < 2; j++) {
            scanf("%d", &p[i][j]);
        }
    }
    o = right();
    if (o == -1) {
        printf("%d\n", o);
        return EXIT_SUCCESS;
    }
    sum((o+1)%3, (o+2)%3);
    p[3][0] = c[0]-p[o][0]; p[3][1] = c[1]-p[o][1];
    printf("%d %d\n", p[3][0], p[3][1]);

    return EXIT_SUCCESS;
}

void sum(int a, int b) {
    for (int i = 0; i < 2; i++) {
        c[i] = p[a][i] + p[b][i];
    }
    return;
}

int right(void) {
    int i1, i2;
    int ax, ay;
    int bx, by;
    int in[3];
    for (int i = 0; i < 3; i++) {
        i1 =(i+1) % 3;
        i2 = (i+2) % 3;
        ax = p[i1][0] - p[i][0]; ay = p[i1][1] - p[i][1];
        bx = p[i2][0] - p[i][0]; by = p[i2][1] - p[i][1];
        in[i] = ax*bx + ay*by;
    }
    for (int i = 0; i < 3; i++) {
        if (in[i] == 0) {
            if (in[(i+1)%3] == in[(i+2)%3]) {
                return i;
            }
        }
    }
    return -1;
}