def main(io)
  s = io.get(String)
  t = s.chars.map(&.to_i)
  u = Array.new(9, 0)
  t.each do |ti|
    u[ti-1] += 1
  end

  (0...9).each do |i|
    next if u[i] == 4
    v = u.dup
    v[i] += 1
    io.put i+1 if agari?(v)
  end
end

def agari?(v)
  return true if v.all? { |vi| vi == 0 || vi == 2 }

  (0...9).any? do |i|
    next if v[i] < 2
    w = v.dup
    w[i] -= 2
    agari_without_atama?(w)
  end
end

def agari_without_atama?(w)
  (0...9).each do |i|
    w[i] -= 3 if w[i] >= 3
  end

  while w.sum > 0
    x = w.index { |wi| wi > 0 }
    return false if x.nil?
    return false if x >= 7 || w[x+1] == 0 || w[x+2] == 0
    w[x] -= 1
    w[x+1] -= 1
    w[x+2] -= 1
  end
  true
end

class ProconIO
  def initialize
    @buf = [] of String
    @index = 0
  end

  def get(k : T.class = Int32) forall T
    get_v(k)
  end

  def get(*ks : T.class) forall T
    ks.map { |k| get_v(k) }
  end

  macro define_getn
    {% for i in (2..9) %}
      def get{{i}}(k : T.class = Int32) forall T
        get({% for j in (1..i) %}k{% if j < i %}, {% end %}{% end %})
      end
    {% end %}
  end
  define_getn

  def get_a(n : Int, k : T.class = Int32) forall T
    Array.new(n) { get_v(k) }
  end

  def get_c(n : Int, k : T.class = Int32) forall T
    get_a(n, k)
  end

  def get_c(n : Int, *ks : T.class) forall T
    a = Array.new(n) { get(*ks) }
    ks.map_with_index { |_, i| a.map { |e| e[i] } }
  end

  macro define_getn_c
    {% for i in (2..9) %}
      def get{{i}}_c(n : Int, k : T.class = Int32) forall T
        get_c(n, {% for j in (1..i) %}k{% if j < i %}, {% end %}{% end %})
      end
    {% end %}
  end
  define_getn_c

  def get_m(r : Int, c : Int, k : T.class = Int32) forall T
    Array.new(r) { get_a(c, k) }
  end

  def put(*vs)
    vs.each.with_index do |v, i|
      put_v(v)
      print i < vs.size - 1 ? " " : "\n"
    end
  end

  def put_e(*vs)
    put(*vs)
    exit
  end


  private def get_v(k : Int32.class); get_token.to_i32; end
  private def get_v(k : Int64.class); get_token.to_i64; end
  private def get_v(k : String.class); get_token; end

  private def get_token
    if @buf.size == @index
      @buf = read_line.split
      @index = 0
    end
    v = @buf[@index]
    @index += 1
    v
  end

  private def put_v(vs : Enumerable)
    vs.each_with_index do |v, i|
      print v
      print " " if i < vs.size - 1
    end
  end

  private def put_v(v)
    print v
  end
end

main(ProconIO.new)