defmodule Main do
  def main do
    solve(0)
  end

  def solve(x) do
    :io.format("~3..0b~n", [x])
    res = input()
    if res == "locked", do: solve(x+1)
  end

  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: (if b, do: "Yes", else: "No")
end