xy=[]
a=list(map(int,input().split()))
xy.append((a[0],a[1]))
xy.append((a[2],a[3]))
xy.append((a[4],a[5]))

def f(s,t,u):
  XY=[]
  for i,j in xy:
    XY.append((i,j))
  x4=XY[s][0]+XY[t][0]-XY[u][0]
  y4=XY[s][1]+XY[t][1]-XY[u][1]
  XY.append((x4,y4))
  L=set()
  for i in range(4):
    for j in range(i+1,4):
      L.add((XY[i][0]-XY[j][0])**2+(XY[i][1]-XY[j][1])**2)
  if len(L)==2:
    print(x4,y4)
    exit()

f(0,1,2)
f(1,2,0)
f(2,0,1)

print(-1)