X1, Y1, X2, Y2, X3, Y3 = map(float, raw_input().split())

L12 = (X1-X2)**2 + (Y1-Y2)**2
L23 = (X3-X2)**2 + (Y3-Y2)**2
L31 = (X1-X3)**2 + (Y1-Y3)**2

if L12 == L23:
    X4, Y4 = X3 + X1 - X2, Y3 + Y1 - Y2
elif L12 == L31:
    X4, Y4 = X3 + X2 - X1, Y3 + Y2 - Y1
elif L23 == L31:
    X4, Y4 = X1 + X2 - X3, Y1 + Y2 - Y3
else:
    print -1
    exit()

print int(X4), int(Y4)