offset = 0
flag = false
pre = 0
10.times do |i|
  10.times do |j|
    flowNum = j * 10 ** i
    puts '%010d' % (flowNum + offset)
    STDOUT.flush
    hit, state = gets.chomp.split()
    if state == 'unlocked'
      flag = true
      break
    end
    if j == 0
      pre = hit.to_i
    elsif hit.to_i < pre
      offset += (j - 1) * 10 ** i
      break
    elsif hit.to_i > pre
      offset += flowNum
      break
    end
  end
  break if flag
end