# frozen_string_literal: true

cs = Array.new(10)
(0..9).each do |i|
  puts i.to_s * 10
  STDOUT.flush
  c, l = gets.split.then { |c, l| [c, l == 'unlocked'] }
  if l
    exit
  else
    cs[i] = c.to_i
  end
end
(0..9).zip(cs).map { _1.to_s * _2 }.flatten.permutation.each do |k|
  puts k.join
  STDOUT.flush
  _, l = gets.split.then { |c, l| [c, l == 'unlocked'] }
  exit if l
end