A, B, C = gets.split.take(6).map(&:to_i).each_slice(2).to_a

def f()
  [A, B, C].permutation(3).find{|a, b, c|
    x = a[0] - b[0]
    y = b[1] - a[1]

    if c[0] - b[0] == y && c[1] - b[1] == x
      return [c[0] + x, c[1] - y]
    end
  }
end

ans = f()
if ans
  puts ans * " "
else
  p -1
end