x1,y1,x2,y2,x3,y3 = map(int,input().split())
length = []
length.append((x1-x2)**2+(y1-y2)**2)
length.append((x3-x2)**2+(y3-y2)**2)
length.append((x3-x1)**2+(y3-y1)**2)
minl = min(length)
maxl = max(length)
if length.count(minl) == 2 and maxl/minl == 2:
    ind = length.index(maxl)
    if ind == 0:
        x = x1+x2-x3
        y = y1+y2-y3
    elif ind == 1:
        x = x3+x2-x1
        y = y3+y2-y1
    elif ind == 2:
        x = x1+x3-x2
        y = y1+y3-y2
    print(x,y)
else:
    print(-1)