def dist_pow2(xa, ya, xb, yb):
    return (xa-xb)**2 + (ya-yb)**2

X1, Y1, X2, Y2, X3, Y3,  = map(int, input().split())

dist12 = dist_pow2(X1, Y1, X2, Y2)
dist13 = dist_pow2(X1, Y1, X3, Y3)
dist23 = dist_pow2(X2, Y2, X3, Y3)

if dist12 == 0 or dist13 == 0 or dist23 == 0:
    print(-1)
    exit()

if dist12 == dist13:
    O, A, B = [X1, Y1], [X2, Y2], [X3, Y3]
elif dist12 == dist23:
    O, A, B = [X2, Y2], [X3, Y3], [X1, Y1]
elif dist23 == dist13:
    O, A, B = [X3, Y3], [X1, Y1], [X2, Y2]
else:
    print(-1)
    exit()

OA = [A[0] - O[0], A[1] - O[1]]
OB = [B[0] - O[0], B[1] - O[1]]

dot = OA[0] * OB[0] + OA[1] * OB[1]
if dot != 0:
    print(-1)
    exit()

ans = [O[0] + OA[0] + OB[0], O[1] + OA[1] + OB[1]]

print(*ans)