x1, y1, x2, y2, x3, y3 = map(int, input().split())
P = [(x1, y1), (x2, y2), (x3, y3)]
import itertools
for p in itertools.permutations(range(3)):
    x0, y0 = P[p[0]]
    x1, y1 = P[p[1]]
    x2, y2 = P[p[2]]
    v0 = (x1-x0, y1-y0)
    v1 = (x2-x0, y2-y0)
    if v0[0]*v1[0]+v0[1]*v1[1] == 0 and v0[0]**2+v0[1]**2 == v1[0]**2+v1[1]**2:
        x3 = x0+v0[0]+v1[0]
        y3 = y0+v0[1]+v1[1]
        print(x3, y3)
        exit()
else:
    print(-1)