s = gets.chomp.split("").map(&:to_i).sort

def f(n,g)
  return g.all?{|k, v| v == 0 } if n > 9
  if g[n] == 0
    f(n+1,g)
  else
    (if n <= 7 && g[n] > 0 && g[n+1] > 0 && g[n+2] > 0
     g[n] -= 1;g[n+1] -= 1;g[n+2] -= 1
     f(n,g).tap{ g[n] += 1;g[n+1] += 1;g[n+2] += 1 } end)||
      (if g[n] >= 3;g[n] -= 3;f(n,g).tap{ g[n] += 3 } end )
  end
end

p *(1..9).select{|n|
  a =s+[n]
  h = a.group_by(&:itself).map{|k,v|[k,v.size]}.to_h
  h.default = 0
  next if (1..9).any?{|x| h[x] >4}
  if h.all?{|k,v| v ==2}
    true
  else
    (1..9).any?{|j|
      next if h[j] < 2
      g = h.dup; g[j] -= 2
      f(1,g)
    }
  end
}