local str = io.read()
local t = {}
for i = 1, 9 do t[i] = 0 end
for i = 1, 13 do
  local a = tonumber(str:sub(i, i))
  t[a] = t[a] + 1
end

local function agaricore(tbl, tp)
  local tblcpy = {unpack(tbl)}
  for i = 1, 4 do
    local curmin = 9
    for j = 1, 9 do if 0 < tblcpy[j] then curmin = j break end end
    if tp[i] == 1 then
      if tblcpy[curmin] <= 2 then
        return false
      else
        tblcpy[curmin] = tblcpy[curmin] - 3
      end
    else
      if 8 <= curmin then
        return false
      elseif tblcpy[curmin] == 0 or tblcpy[curmin + 1] == 0 or tblcpy[curmin + 2] == 0 then
        return false
      else
        tblcpy[curmin] = tblcpy[curmin] - 1
        tblcpy[curmin + 1] = tblcpy[curmin + 1] - 1
        tblcpy[curmin + 2] = tblcpy[curmin + 2] - 1
      end
    end
  end
  return true
end

local function agari(tbl)
  -- chiitoi
  local chiitoi = 0
  for i = 1, 9 do
    if tbl[i] == 2 then chiitoi = chiitoi + 1 end
  end
  if chiitoi == 7 then return true end

  for i_atama = 1, 9 do
    if 2 <= tbl[i_atama] then
      tbl[i_atama] = tbl[i_atama] - 2
      -- print(unpack(tbl))
      for c = 0, 15 do
        local tp = {}
        local tc = c
        for i = 1, 4 do
          table.insert(tp, tc % 2)
          tc = math.floor(tc / 2)
        end
        local ret = agaricore(tbl, tp)
        if ret then
          tbl[i_atama] = tbl[i_atama] + 2
          return true
        end
      end
      tbl[i_atama] = tbl[i_atama] + 2
    end
  end
  return false
end

for i = 1, 9 do
  -- print("--" .. i .. "--")
  if t[i] <= 3 then
    t[i] = t[i] + 1
    -- print(unpack(t))
    -- print("--")
    if agari(t) then
      print(i)
    end
    t[i] = t[i] - 1
  end
end