def send_query(nums)
  STDOUT.puts(nums.join(' '))
  STDOUT.flush
  a, b = gets.chomp.split.map(&:to_i)
  [a, b]
end

nums = [*0..9]

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

  if c == 4
    nums -= blo
  end
end

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

  break if a == 4
end