from itertools import permutations
X1,Y1,X2,Y2,X3,Y3 = map(int,input().split())
X = [X1, X2, X3]
Y = [Y1 ,Y2, Y3]
L = [i for i in range(3)]
L = list(permutations(L, 3))
for a,b,c in L:
    X1,Y1 = X[a],Y[a]
    X2,Y2 = X[b],Y[b]
    X3,Y3 = X[c],Y[c]
    AB = (X2 - X1) ** 2 + (Y2 - Y1) ** 2
    BC = (X3 - X2) ** 2 + (Y3 - Y2) ** 2
    CA = (X1 - X3) ** 2 + (Y1 - Y3) ** 2
    if AB != BC or AB + BC != CA:
        continue
    P,Q = (X1 + X3) / 2, (Y1 + Y3) / 2
    print(int(P * 2 - X2), int(Q * 2 - Y2))
    exit()
print(-1)