import sys
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines

import itertools

x1,y1,x2,y2,x3,y3 = map(int,read().split())
p1 = (x1,y1)
p2 = (x2,y2)
p3 = (x3,y3)

def dist(p,q):
    return (p[0]-q[0])**2 + (p[1]-q[1])**2

def is_square(p1,p2,p3,p4):
    # この順に平行四辺形を仮定
    d1 = dist(p1,p2)
    d2 = dist(p2,p3)
    d3 = dist(p1,p3)
    return (d1==d2) and (d3==d1*2)

answer = None
for p,q,r in itertools.permutations([p1,p2,p3]):
    s = tuple(p[i]+r[i]-q[i] for i in [0,1])
    if is_square(p,q,r,s):
        answer = s

if answer is None:
    print(-1)
else:
    print(*answer)