program yukicoder_2400
  use, intrinsic :: iso_fortran_env
  implicit none
  integer(int64) :: a_re, a_im, b_re, b_im
  read(input_unit, *) a_re, a_im
  read(input_unit, *) b_re, b_im
  write(output_unit, '(*(i0, 1x))') a_re * b_re - a_im * b_im, a_re * b_im + a_im * b_re
end program yukicoder_2400