program main
  implicit none
  integer::L(1:3),LA(1:3),LS(1:3)
  integer::RBY(1:3),RBYS(1:3)
  read *,L,RBY
  LA(1)   = L(2) + L(3)
  LA(2)   = L(3) + L(1)
  LA(3)   = L(1) + L(2)
  LS(1)   = MINVAL(LA)
  LS(3)   = MAXVAL(LA)
  LS(2)   = SUM(LA)-MINVAL(LA)-MAXVAL(LA)
  RBYS(3) = MINVAL(RBY)
  RBYS(1) = MAXVAL(RBY)
  RBYS(2) = SUM(RBY)-MINVAL(RBY)-MAXVAL(RBY)
  print '(i0)', DOT_PRODUCT(RBYS,LS)*2
end program main