defmodule Main do
  def input, do: IO.read(:line) |> String.trim
  def ii, do: input() |> String.to_integer
  def li, do: input() |> String.split |> Enum.map(&String.to_integer/1)
  def yn(b), do: IO.puts(if b, do: "Yes", else: "No")

  def main do
    m = for i <- 0..9, into: %{}, do: {i, 0}
    f(0, m)
  end

  def f(p, m) do
    {i, _} = for i <- 0..9, reduce: {-1, -1} do
      {q, ma} ->
        m2 = Map.update!(m, p, fn _ -> i end)
        same = query(m2)
        if same == 10, do: System.halt()
        cond do
          same > ma -> {i, same}
          true -> {q, ma}
        end
    end

    m2 = Map.update!(m, p, fn _ -> i end)
    f(p+1, m2)
  end

  def query(m) do
    put(m)
    read()
  end

  def read() do
    [x, _msg] = input() |> String.split
    String.to_integer(x)
  end

  def put(m) do
    Map.values(m)
    |> Enum.join()
    |> IO.puts
  end
end