def ask a
  puts a.join(' ')
  $>.flush
  x,y = gets.split.map(&:to_i)
  x == 4 ? exit(0) : [x,y]
end

a = nil

[*0...10].combination(4).to_a.shuffle.each { |c|
  if (ask c) == [0,0]
    a = c
    break
  end
}

4.times { |i|
  x = nil
  10.times { |j|
    next if a.include? j
    a[i] = j
    x, = ask a
    break if x == i+1
  }
}