x1,y1,x2,y2,x3,y3 = map(int,input().split())
flag = -1
def dot(a,b):
    return a[0]*b[0]+a[1]*b[1]
a1 = (x2-x1,y2-y1)
b1 = (x3-x1,y3-y1)
if dot(a1,b1)==0 and dot(a1,a1)==dot(b1,b1):
    flag = 1
    ans = (x1+a1[0]+b1[0],y1+a1[1]+b1[1])
if flag==-1:
    a2 = (x1-x2,y1-y2)
    b2 = (x3-x2,y3-y2)
    if dot(a2,b2)==0 and dot(a2,a2)==dot(b2,b2):
        flag = 1
        ans = (x2+a2[0]+b2[0],y2+a2[1]+b2[1])
if flag==-1:
    a3 = (x1-x3,y1-y3)
    b3 = (x2-x3,y2-y3)
    if dot(a3,b3)==0 and dot(a3,a3)==dot(b3,b3):
        flag = 1
        ans = (x3+a3[0]+b3[0],y3+a3[1]+b3[1])
if flag==-1:
    print(-1)
else:
    print(*ans)