import sys


def input(): return sys.stdin.readline().rstrip()


def main():

    def solve(x1, y1, x2, y2, x3, y3):
        x4, y4 = x1+x3-x2, y1+y3-y2

        if x1 == x2 == x3 or y1 == y2 == y3:
            return None

        if (x1-x2)**2 + (y1-y2)**2 != (y2-y3)**2 + (x2-x3)**2:
            return None

        if (x3-x2)*(x2-x1) + (y3-y2)*(y2-y1) != 0:
            return None

        return x4, y4

    x1, y1, x2, y2, x3, y3 = map(int, input().split())
    ans1 = solve(x1, y1, x2, y2, x3, y3)
    ans2 = solve(x1, y1, x3, y3, x2, y2)
    ans3 = solve(x2, y2, x1, y1, x3, y3)

    if ans1 is not None:
        print(*ans1)
    elif ans2 is not None:
        print(*ans2)
    elif ans3 is not None:
        print(*ans3)
    else:
        print(-1)


if __name__ == '__main__':
    main()