#coding: utf-8
##yuki_55

def check(a,b,c):
 vbx=x[b]-x[a]
 vby=y[b]-y[a]
 vcx=x[c]-x[a]
 vcy=y[c]-y[a]
 if vbx*vcx+vby*vcy:
  return False
 if vbx*vbx+vby*vby!=vcx*vcx+vcy*vcy:
  return False
 x[3]=x[a]+vbx+vcx
 y[3]=y[a]+vby+vcy
 return True
 
x=[0 for i in xrange(4)]
y=[0 for i in xrange(4)]
x[0],y[0],x[1],y[1],x[2],y[2]=map(int,raw_input().split())
if check(0,1,2) or check(1,0,2) or check(2,1,0):
 print x[3],y[3]
else:
 print -1