local str = io.read()
local t = {}
local function cww(i, j, k)
  ret = 0
  if(1 <= t[i] and 0 <= t[j] and 0 <= t[k]) then
    if(t[i] ~= t[j] and t[j] == t[k]) then
      ret = t[i] * 100 + t[j] * 11
    end
  end
  return ret
end

local box = {}
for i = 1, 12 do box[i] = false end

local function setbox(i, j, k, flag)
  box[i], box[j], box[k] = flag, flag, flag
end
local function getbox(idx)
  local i = 1
  for j = 1, 12 do
    if(not box[j]) then
      if(i == idx) then return j
      else i = i + 1 end
    end
  end
  return nil
end
if(str == "1000000000000") then
  print(100)
else
  for i = 1, 12 do
    if(#str < i) then t[i] = -1 else t[i] = tonumber(str:sub(i, i)) end
  end
  local cwwmax = 0
  for i1=1,10 do for j1=i1+1,11 do for k1=j1+1,12 do
    setbox(i1, j1, k1, true)
    for i2=1,7 do for j2=i2+1,8 do for k2=j2+1,9 do
      local i2r, j2r, k2r = getbox(i2), getbox(j2), getbox(k2)
      setbox(i2r, j2r, k2r, true)
      for i3=1,4 do for j3=i3+1,5 do for k3=j3+1,6 do
        local i3r, j3r, k3r = getbox(i3), getbox(j3), getbox(k3)
        setbox(i3r, j3r, k3r, true)
        local i4r, j4r, k4r = getbox(1), getbox(2), getbox(3)
        cwwmax = math.max(cwwmax, cww(i1,j1,k1)+cww(i2r,j2r,k2r)+cww(i3r,j3r,k3r)+cww(i4r,j4r,k4r))
        setbox(i3r, j3r, k3r, false)
      end end end
      setbox(i2r, j2r, k2r, false)
    end end end
    setbox(i1, j1, k1, false)
  end end end
  print(cwwmax)
end