program main
  implicit none
  integer*8::C(26)
  integer*8::h,e,l,o,w,r,d
  integer*8::m
  real::x,n
  read *,C
  h = C(8)
  e = C(5)
  l = C(12)
  o = C(15)
  w = C(23)
  r = C(18)
  d = C(4)
  if(h.lt.1 .or. &
     e.lt.1 .or. &
     l.lt.3 .or. &
     o.lt.2 .or. &
     w.lt.1 .or. &
     r.lt.1 .or. &
     d.lt.1) then
     print '(i0)',0

  else
     m = get_max(l)
     print '(i0)',h*e*m*(o-1)*w*r*d
  end if
contains
  function get_max(l) result(m)
    integer*8::i,m,l
    m = 1
    do i=2,l-1
       m = MAX(m, (l-i)*i*(i-1)/2)
    end do
  end function get_max
end program main