def send_query(nums)
  raise if nums.uniq.size != 4
  STDOUT.puts(nums.join(' '))
  STDOUT.flush
  a, b = gets.chomp.split.map(&:to_i)
  if a == 4
    exit
  end
  [a, b]
end

nums = [*0..9]

[*0..9].combination(2) do |blo|
  list = [*0..9] - blo
  c = 0
  a, b = send_query(list[0..3])
  c += a + b
  a, b = send_query(list[4..7])
  c += a + b

  if c == 4
    nums -= blo
  end
end

raise if nums.uniq.size != 4

nums.permutation(4) do |list|
  a, b = send_query(list)

  break if a == 4
end