program main
  implicit none
  character*12::S
  integer::i,j,lenk,p,maxindx,minindx
  integer*8,allocatable::N(:)
  integer::digit(0:9),kinds,maxcww,mincww,limitcww
  data digit/10*0/

  read *,S
  lenk = LEN_TRIM(S)
  if(lenk.lt.3) then
     print '("0")'
     return
  end if

  allocate(N(lenk))

  do i=1,lenk
     N(i) = ICHAR(S(i:i))-ICHAR('0')
     digit(N(i)) = digit(N(i)) +1
  end do

  kinds=COUNT(digit.ne.0)
  if(kinds.eq.1) then
     print '("0")'
  else if(kinds.eq.2) then
     limitcww = getlimit(digit)
     p=partmax(N)
     print '(i0)', p
  else
     limitcww=3952
     p=partmax(N)
     print '(i0)', p
  endif
contains
  recursive function partmax(N) result(pmax)
    integer*8,intent(in) ::N(:)
    integer*8,allocatable::M(:)
    integer*8::cww,pmax,i,j,k,l,len,ni100
    integer,save::num=0
    num = num + 1
    pmax = 0
    len = size(N)
    if(len .lt. 3) then
       return
    else
       do i=1,len-2
          if(N(i).eq.0) cycle
          ni100=N(i)*100
          do j=i+1,len-1
             if(N(i).eq.N(j)) cycle
             cww = ni100+N(j)*11
             do k=j+1, len
                if(N(j).ne.N(k)) cycle
                M = pack(N, (/(l.ne.i.and.l.ne.j.and.l.ne.k,l=1,len)/))
                pmax = MAX(cww+partmax(M),pmax)
                if(pmax.eq.limitcww) then
                   return
                end if
             end do
          end do
       end do
    endif
  end function partmax
  function getlimit(D) result(limit)
    integer,intent(in)::D(0:9)
    integer::limit,maxnum,minnum
    limit = 0
    do i=0,9
       if(D(i).ne.0) then
          minindx = i
          exit
       end if
    end do
    do i=9,0,-1
       if(D(i).ne.0) then
          maxindx = i
          exit
       end if
    end do
    maxcww=maxindx*100+minindx*11
    mincww=minindx*100+maxindx*11
    maxnum=D(maxindx)
    minnum=D(minindx)
    do i=0,4 !minindx
       do j=0,4-i !maxindx
          if((i+2*j).le.minnum.and.(2*i+j).le.maxnum) then
             limit = MAX(limit, i*mincww+j*maxcww)
          end if
       end do
    end do
  end function getlimit
  function getnum(M) result(num)
    integer*8,intent(in)::M(:)
    integer::s,i,num
    s = size(M)
    num = 0
    do i=1,s
       num = num+M(i)*10**(i-1)
    end do
  end function getnum
end program main